There are the tragic villains from Disney who are simply misunderstood or they are so charismatic that it's impossible to hate them, despite their evil deeds. Then there are the villains that warrant their inevitable demise, the most despicable of the despicable.
These are the villains that audiences anticipate their death. In several cases, not only do they get their comeuppance but end up earning it in the most satisfying way possible. Yes, it is cruel to enjoy someone's death but in these cases, the audience shouldn't feel guilty considering how cruel the characters are.
Syndrome - The Incredibles
Toxic fans are some of the worst people to interact with, so imagine if one of them had the brains and the money to use against those they love/hate? The result is an obnoxious genius known as Buddy AKA Syndrome from The Incredibles, a Mr. Incredible fanboy turned villain.
Everything about Syndrome is just unlikable, giving nerds a bad name; he even kidnaps a baby just to get back at Mr. Incredible. This is why when he is sucked into a jet turbine by his own cape followed by his plane exploding, it results in a heavy sigh of relief.
The Evil Queen - Snow White And The Seven Dwarfs
The one that started it all, the Evil Queen earns her title trying to have a huntsman murder the fair Snow White and cut out her heart. When that doesn't work, she dons the disguise of an old hag to poison Snow White; both homicide attempts were simply because she was jealous.
The Evil Queen was also the start of a long-running trope for villains. The Evil Queen stands out not only because it was the first but because she is struck by lightning and the cliff crumbles beneath her feet, allowing her to fall before the boulder she was attempting to kill the dwarfs with falls on her. Finally, buzzards have their fill on her corpse. All while disguised as an ugly old hag: poetic justice at some of its best.
Clayton - Tarzan
He lies, he betrays, and he captures animals for the money while hunting others for joy; that is Clayton from Tarzan, one of Disney's best non-musical films. Even before his villainous ways are revealed, Clayton is just a cold man who treated everyone as if they were beneath him. This was thanks to Brian Blessed's stellar performance as the villain.
In the climactic showdown with Tarzan, the cocky Clayton becomes trapped in vines and begins to foolishly cut every vine in his way. This causes him to fall with a vine noosed around his neck, resulting in the snapping of his spine just off the screen. The shadow of his hanging corpse is enough to make anyone cheer.
Scar - The Lion King
What kind of man murders his own brother, frames his nephew for it, then sends for said nephew's death? Scar from The Lion King, brother of King Mufasa. Scar is willing to say or do anything to get his way, including shifting the blame to the hyenas for everything.
This last straw is what leads to him being betrayed and devoured by the Hyenas after his battle with Simba. None of the gore is shown but seeing the death via their shadows is still equally satisfying seeing how it leaves it to the imagination of the viewer.
Hopper - A Bug's Life
It's always great to see an oppressor get his due. So not only does the ant colony revolt against Hopper and his grasshopper gang, he also meets his greatest fear. Flick lures Hopper away from the colony where a songbird is waiting: for humans, the bird is cute but to Hopper, it's the equivalent of a kaiju.
However, the bird doesn't eat him, it instead grabs and takes Hopper to its nest where it feeds him to her babies. Cruel, dark, and torturous? Yes. Did Hopper deserve it? Most definitely seeing how he is one of Pixar's most evil villains.
Percival C. McLeach - The Rescuers: Down Under
Madame Medusa from the first Rescuers film is bad but she never dies. Whereas her successor in The Rescuers: Down Under, McLeach, is an admittedly hilarious villain but evil nonetheless. He poaches rare animals for the fun and the money but has more wickedness about it than Clayton.
McLeach tries to kill a young boy who only wanted to protect the animals. So, while being eaten by the crocodiles he attempts to feed the boy to would have been nice, he instead follows a classic trope. He goes over a waterfall and falls to his grave with a scream of fear while the pet he abused simply waves goodbye.
Gaston - Beauty And The Beast
Another villain that falls from grace, literally. Whether it's the animated version or the live-action Beauty And The Beast remake version played by Luke Evans. In the animation, he's a cocky Adonis type whose ego would eclipse the sun so it turns him into a raging brute.
On the other hand, Luke Evans' version is a psychopath who seemingly has PTSD and a superiority complex, unable to take any form of rejection. He even tries to kill Belle's father before having him committed. So both versions of Gaston are equally vicious in different ways, so when he falls from the Beast's castle rooftop, it is nothing short of applause-worthy.
Doctor Facilier - Princess And The Frog
From Princess And The Frog, Doctor Facilier is a dark and charismatic witch doctor; he turned a prince into a frog so that Facilier could take over New Orleans. When his scheme fails, his friends on the other side turn out to be not-so-friendly and drag him to, what the audience assumes, is the underworld.
Keith David brings a lot of charm and wit to the character along with a debonair voice but Facilier is pure evil. Seeing him beg and attempt to cling to his existence on Earth is just perfect, seeing such a calm and confident character be reduced to the exact opposite.
Mother Gothel - Tangled
Vanity personified, Mother Gothel from Tangled is a witch obsessed with immortality so she stole an enchanted princess as a baby and raised it as her own in a lone tower. Gaslight manipulation, deception, and cruelty are all present as she pretends to love Rapunzel but only cares about herself.
Everything she does makes the audience visibly angry and wish for the worst punishment. That she gets when Flynn cuts off Rapunzel's magic hair, removing her source of immortality. In seconds, Gothel ages what are likely centuries that she missed, even turning to ash as she falls from the tower that she imprisoned Rapunzel in. Perfect ending to an awful person.
Judge Claude Frollo - The Hunchback Of Notre Dame
Frollo is easily Disney's darkest villain: he nearly drowns a baby, kills its mother, raises it as his own, states that his mother is the one who attempted to kill him, then teaches him that people will only hate him. Throughout The Hunchback Of Notre Dame, Frollo continues to get worse as he lusts for Esmerelda.
He decides to burn down Paris to get to her and her people, either forcing her to be his lover or she dies on the pyre as a witch. Frollo commits nearly every sin that he's sworn to fight, chalking it all up as him doing what's God's work. This darkness is what makes Frollo's death so cathartic when the gargoyle of the church comes to life, breaks off, forcing them to fall into the molten oil he was using to destroy Paris.