Thanks to the unimaginable success of the Marvel Cinematic Universe, everyone in the world knows who Tony Stark (aka Iron Man) is, famously played by Robert Downey Jr. Fans may love him for his personality, but it's his genius-level intellect that makes him such a valuable asset to the Avengers.

As evidenced over the course of several movies (and decades of comics), Tony Stark is a scientific genius, someone who's capable of creating the most advanced technology the world has ever seen. After all, he created the first Iron Man armor while in captivity, something we attribute to his impressive MacGyver-like skills.

While he is undoubtedly one of the smartest people in the world, the fact is, he's not the smartest. There are characters -- both superheroes and supervillains -- that are considered more intelligent than him. With that in mind, in no particular order, here are 15 Marvel Characters Smarter Than Tony Stark.

15. The Leader

The Leader attacks in Marvel Comics.

It may be considered unfair to compare Tony Stark to mutated characters, but we are discussing Marvel characters here -- and there aren't many that are strictly human, devoid of any superpowers. With that in mind, one character who is smarter than Tony Stark is Samuel Sterns, AKA the Leader.

A former janitor from Boise, Idaho, Sterns was infected by gamma radiation and consequently transformed into a highly intelligent creature known as the Leader. His transformation endowed him with extraordinary intelligence, including a practical understanding of physics, genetics, and robotics. Beyond his superhuman intellect, though, the Leader is effectively clairvoyant. He is exceptional in information-gathering and problem-solving, thus making him a worthy opponent for both the Hulk and Tony Stark.

Those who've seen Louis Leterrier's The Incredible Hulk may recognize the character played by Tim Blake Nelson. He was depicted as a university professor attempting to help Bruce Banner find a cure for his ailments.

14. Mister Sinister

Mr Sinister from X-men

The supervillain Nathaniel Essex, aka Mister Sinister, was teased in a post-credits scene in Bryan Singer's X-Men: Apocalypse earlier this year. While fans assumed he would play the villain in an inevitable X-Men sequel, he may, in fact, be the villain in James Mangold's upcoming Logan movie (formerly titled Wolverine 3), which will mark Hugh Jackman's final performance as the Wolverine.

Although he is not a mutant, Nathaniel Essex does hold a variety of powers, such as telekinesis, regeneration, and shapeshifting, among other things. However, his most important attribute is that he is a genius-level polymath, someone who could easily rival Tony Stark. And he uses his knowledge to test and clone mutants with the goal of perfecting human evolution.

Nathanial Essex has studied biology, physics, genetics, cloning, and engineering, all of which he has mastered throughout decades of experience. While Stark and Essex obviously practice different sciences, there is no denying that when it comes to genetics, Mister Sinister is unmatched.

13. Valeria Richards

By Naming A Child, Doctor Doom Defeats His Greatest Enemy

As with many aspects of the comic book world, the circumstances surrounding Valeria Richards' birth and introduction into the Marvel Universe is convoluted, as it involves alternate realities, time-travel, and Doctor Doom. Therefore, for the purposes of this list, we'll skip to the part that accepts Valeria as the second child of Reed Richards, aka Mister Fantastic, and Sue Storm, aka the Invisible Woman, two of the founding members of the original Fantastic Four superhero team.

Being the daughter of Reed Richards comes with its fair share of expectations, of which intelligence ranks the highest. Despite being young, Valeria has already demonstrated her high intellect. The fact is, Valeria has shown an aptitude for being as intelligent as both Reed Richards and Victor von Doom, two of the smartest people in the Marvel Universe -- which is why she eventually joined her father's Future Foundation, aiming to better humanity's scientific future. With a story like that, we believe it's safe to say she is smarter than Tony Stark, or at least she will be.

12. Hank Pym

Ant Man Hank Pym

Besides being inhumanly intelligent, Hank Pym is one of the most important characters in the Marvel Universe, having been a founding member of the Avengers as well as the first Ant-Man. Unlike many of the characters on this list, Hank Pym is an ordinary human with extraordinary abilities -- and a scientific genius. He's a brilliant biochemist with unparalleled expertise in nanotechnology, quantum physics, and artificial intelligence, all fields that helped him discover Pym Particles, which he used both to increase and decrease his size.

Despite being the brainchild of Tony Stark and Bruce Banner in Avengers: Age of Ultron, Ultron was created solely by Hank Pym in the comics. And that wasn't even his crowning achievement. Pym has developed technology allowing Avengers to teleport from one place to another, holographic technology capable of fooling even the most advanced security, and he even created a virtual reality allowing the deceased to continue living. Hank Pym, essentially, created a virtual Heaven.

11. Thanos

Thanos and the Infinity Gauntlet beat Spider-Man and Hulk

Both comic book fans and casual moviegoers have been anxiously anticipating Thanos' inevitable battle with the Avengers since it was first teased back in 2012 in the post-credits scene of Joss Whedon's The Avengers. While we've seen Thanos on a handful of occasions since then, it will be quite some time before fans get that ultimate showdown we've been waiting for.

When that fight does eventually happen, the Mad Titan will presumably be unstoppable, for he will likely have acquired all six Infinity Gems -- primordial stones representing various components of Existence -- and embedded them within the Infinity Gauntlet. By doing so, Thanos would become omnipotent and virtually unstoppable. But the thing is, he doesn't need the Infinity Gauntlet in order to beat the Avengers.

Thanos may be imbued with various superpowers due to being a mutant-Eternal hybrid, but one of his most important attributes is his incomprehensible intelligence. He has not only mastered all fields of advanced science, but also obtained the secrets of the galaxy by using the Infinity Well. Tony Stark has built some incredible weapons in his time, but Thanos has constructed force fields that could wound even Galactus.

10. Lunella Lafayette

Lunella Lafayette aka Moon Girl

Most people may not be aware of Lunella Lafayette, but they certainly should be, for she is quite possibly the most intelligent character in the entire Marvel Universe. She is one of Marvel's new Inhuman characters, having made her debut in Moon Girl and Devil Dinosaur earlier this year.

After undoing Terrigenesis -- the process by which humans transform into Inhumans -- Lunella gained a number of unique abilities. The process endowed her with a standard Inhuman physiology, including superhuman strength, speed, endurance, and reflexes. However, she has shown to have only a one percent efficiency in each category. She is a child, after all. Yet, according to Captain Kree's analyzer, she has shown also having a 100% intelligence rating.

Lunella Lafayette may only be in the fourth grade, but she's already managed to build a device allowing her to detect Kree technology, determine that she is a Human/Inhuman hybrid, and construct her own battle suit. She certainly has a bright future in the Marvel Universe.

9. Maximus the Mad

Maximus the Mad in Marvel Comics

Maximus Boltagon, a member of a secret society of supervillains known as Cabal, is perhaps the only villainous Inhuman who is smarter than Tony Stark. As the son of one of Attilan's (the Inhumans' hidden home) best geneticists, Maximus was bred for higher intelligence; intelligence that was amplified when he underwent Terrigenesis as a child. In addition to his superhuman intellect and knowledge of biology, mechanics, and physics, Maximus manifested many psionic abilities when he became Inhuman.

Maximus has shown the capacity to control, numb, and efface a person's mind within his vicinity. While his powers are nowhere near as powerful as Professor X's, it's something that he has successfully used on occasion. And similar to Tony Stark, Maximus has demonstrated having the ability to construct complex devices and machines out of simple materials. It's no wonder he was once an ally of the Illuminati. The extent of his intellect is unknown, but it's not difficult to imagine him being on the same level as -- if not smarter than -- Tony Stark.

8. Amadeus Cho

Amadeus Cho standing in front of a Hulk in the Marvel comics

Fans of Joss Whedon's Avengers: Age of Ultron may remember Claudia Kim's character, Helen Cho, a scientist working with the Avengers who may also be the mother of super-genius Amadeus Cho. Although he started out as an anthology character, Amadeus soon became a major part of the Marvel Universe following the World War Hulk storyline. Since his debut in 2005, Amadeus Cho has been a member of several superhero teams, including the New Warriors and Young Avengers. But that's not what's most interesting about him.

When discussing the most intelligent characters in the Marvel Universe, especially those who may be smarter than Tony Stark, we would be remiss if we didn't mention Amadeus Cho. Over the years, Reed Richards, Hank Pym, Bruce Banner, and the Leader have all claimed Amadeus to be one of the smartest characters in the universe. While they can't seem to agree on just how smart he is, he tends to be touted as being around the eighth smartest -- which makes sense considering his mind is equivalent to that of a supercomputer.

7. Prodigy

David Alleyne AKA Prodigy in Marvel Comics

A character doesn't get a codename like Prodigy without being talented. David Alleyne was gifted with natural intelligence, but he didn't understand the true extent of his capacity for knowledge until his mutant powers manifested when he was in school, where he learned that he was able to absorb the knowledge of everyone in his vicinity. Unfortunately, he would be one of many mutants who would lose their powers because of Scarlet Witch during the House of M story arc.

Despite losing all his acquired knowledge and powers during the Decimation storyline, David remained at the Xavier Institute, where he installed his newly-built Danger Cave. Later, as a thanks for saving the Stepford Cuckoos when Col. William Stryker attacked the X-Mansion, the mutant quintuplets restored all of David's previous knowledge that he obtained up until M-Day. Such things he regained included Beast's medical experience and Wolverine's fighting know how. While his powers may be considered a cheat on some level, David Alleyne is a certified genius.

6. Doctor Octopus

Image of Doctor Octopus from Marvel Comics

Otto Octavius, aka Doctor Octopus, is perhaps the greatest Spider-Man villain of all-time, having been the first enemy ever to defeat the wall-crawler, and that's thanks to his strategic planning. As with many comic book characters, however, Octavius' genius is what eventually led him down a path of villainy.

When a four-armed apparatus fused to his body in a laboratory accident, Octavius transformed into the supervillain Doctor Octopus. But before he became Doc Ock, Octavius was a genius-level intellectual, someone who not only specialized in but the led the field of atomic physics and nuclear science -- which is why Mister Fantastic once enlisted his expertise in helping with the Invisible Woman.

As previously mentioned, Tony Stark is one of the smartest people on the planet, but the extent of his intelligence varies depending on the field in question. When it comes to radiation and animal physiology, there is no one better than Dr. Otto Octavius.

5. Hank McCoy

Beast in The Avengers

Thus far in the X-Men prequel trilogy, we've seen Hank McCoy, aka Beast (played by Nicholas Hoult), construct a variety of specialized equipment and devices (such as Cerebra and the X-Men suits) that aid the X-Men both in and out of battle. He even managed to develop a treatment, of sorts, for Charles Xavier, though it didn't have the lasting effects he had hoped for. However, in the comics, Hank was able to manufacture a cure for the Legacy Virus.

It goes without saying that Hank McCoy is a genius; but how smart is he? And is he smarter than Tony Stark? According to Bruce Banner, Hank is considered to be one of the eight smartest people in the world, which is why he has six Ph.D.s in fields such as biophysics and genetics. In fact, it is said that his proficiency in genetics rivals that of Professor X himself, though he has never been fully recognized for it.

4. High Evolutionary

Marvel's High Evolutionary

As previously mentioned, Nathaniel Essex is one of the world's leading authorities on genetics, especially when it comes to mutants. Inspired by his experiments, Herbert Wyndham, aka High Evolutionary, created a device capable of accelerating the evolution of living organisms to their highest potential. By testing this device on himself, Wyndham was able to evolve his mind beyond ordinary human comprehension. Additionally, he's altered his genome to such an extent that he's endowed himself with god-like powers.

Tony Stark has one of the most gifted minds on the planet, but the High Evolutionary has been said to have gained enough knowledge that his intelligence rivals that of cosmic beings such as the Beyonder or Adam Warlock. Herbert Wyndham has evolved his mind to the point that he has virtually unlimited knowledge and has achieved absolute peak human levels of intelligence. His knowledge extends to fields such as biophysics, genetics, cybernetics, chemistry, medicine, and more.

3. Reed Richards

The Fantastic Four

Comic book fans are well aware that Reed Richards, aka Mister Fantastic, is one of the most intelligent people in the Marvel Universe, which is something that has been well represented in both Fantastic Four theatrical adaptations. In the comics, the Intelligentsia has classified him as being one of the eight smartest people on Earth (much like Hank McCoy), though we would consider Reed to be the smartest of the pair.

Richards isn't known as Mister Fantastic for nothing; other than his malleable body, his mind is his true gift. While he was already a skilled scientist before his accident, the cosmic rays that endowed him superpowers also augmented his intelligence to incomprehensible levels. And with his increased intelligence, Richards has been on the forefront of space, time, and extra-dimensional travel, as well as mutations, biophysics, chemistry, and robotics, and other fields.

Tony Stark is a super-genius, there's no doubt about that, but Mister Fantastic has achieved more breakthroughs in science than any other character on this list -- and many of them combined.

2. Doctor Doom

Doctor Doom

While Mister Fantastic is one of the smartest superheroes of all-time, it's only fitting that his one-time friend and now arch-enemy, Victor von Doom, aka Doctor Doom, is one of the smartest supervillains of all-time. Whereas most of the characters on this list have relied heavily on science, Doctor Doom has also dabbled in magic and sorcery, thanks to his mother being a Latverian witch, but that has in no way hindered his scientific genius.

Victor von Doom is easily one of the most prolific supervillains ever to exist. He has constructed numerous advanced machines, such as his infamous Doombots and Servo-Guard, not to mention the fact that he created the world's first time machine. It's difficult to determine who is smarter between Reed Richards and Victor von Doom, for they have both demonstrated the ability to accomplish feats and solve problems that other Marvel minds had never dreamt of going. However, it's safe to say that they both are a bit smarter than Tony Stark.

1. Bruce Banner

Bruce Banner Hulk Transform

Bruce Banner, aka The Hulk, is one of the most recognizable characters in not only the Marvel Universe but also the Marvel Cinematic Universe, where he is played by Mark Ruffalo (formerly Edward Norton). Due to Banner and Tony Stark's incredible minds (as well as the amazing chemistry between Mark Ruffalo and Robert Downey Jr.), the genius duo has come to develop a close, scientific relationship; a relationship that led to the inadvertent creation of Ultron.

While many people would consider Bruce Banner to be as smart as Tony Stark, we'd argue that he's even smarter. There is no doubt that Stark is a talented engineer, but when it comes to other sciences, such as biology, chemistry, medicine, and nuclear physics, there's no denying that Banner is the most intelligent of the two. In fact, over the years, Banner has developed Bannertech equipment that rivals that of Tony Stark, so it's possible that he's bested Tony in the field of engineering as well.

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Who do you think is the Marvel Universe's smartest character? Let us know in the comments?