In The Boys comics, the Seven are treated as a parodic replacement for the Justice League, and Homelander is a self-obsessed bully leagues more powerful than his cohorts. Fans know that Black Noir is secretly a match for Homelander, and that Jack from Jupiter can temporarily equal his durability, but what about all the other heroes that populate the minor roles and have aspirations to join the Seven? There are several contenders that could be in the same league, so if we take Homelander and the rest of the Seven out of contention, who is The Boys' toughest supe?
The Boys push back against corporate-sponsored superheroes with the Seven as their most dangerous and elusive prey. But along the way the government-funded, hero-busting unit also killed or outed numerous heroes with powers on par with the Seven. The other heroes the Boys clash against are often satirical versions of DC and Marvel comics heroes that get a twisted and morally bankrupt turn in the pages created by Garth Ennis and Darick Robertson.
A few lower-tier heroes have unique powers that place them above the normal caped rabble elsewhere in The Boys' universe. Hughie is ordered to observe the hero team Super Duper after a super strong (but super savage) hero Malchemical is booted down to the smaller team. He was dumped from his previous team after using his ability to shapeshift to assault a team member, but since Super Duper is full of more vulnerable heroes, he takes the opportunity to make their lives hell. Hughie confronts Malchemical and the multicolored villain nearly kills Hughie, adopting a gaseous form with barbed tentacles. Butcher arrives and saves him by igniting Malchemical while he is in gas form. Malchemical’s ability to change into any form of matter makes him a serious threat, though Butcher's speedy response suggests these powers have as many downsides as they do advantages.
Of course, there's more than one kind of power. The leader of the G-Men, The Boys' sordid version of the X-Men, is up there in terms of “soft power.” John Godolkin exhibits no super powers in the comics but rules over several of the most profitable superhero teams by trapping young supes in a cycle of abuse. Already wealthy, Godolkin's reach is such that no-one has challenged his disgusting behavior, and many of his victims are willing to kill - even each other - to protect his empire. Godolkin is a clear analogue for Professor X, with the suggestion that his influence is comparable to mind control, even if it isn't supernatural in nature.
Homelander aside, literally the strongest supe the Boys go toe-to-toe with has to be Stormfront. Unlike his TV show counterpart, Stormfront was never a part of the Seven in the comics, instead operating as the leader of the Avengers-esque team Payback. Stormfront nearly roasts the Boys with lightning in his first encounter with the crew, only for him to be blinded in one eye. He managed to put the Female into a coma and nearly throttled Mother’s Milk, but in a showdown with the remaining team members healthy enough to fight, he is stomped to death by Butcher, Frenchie and their ally supe Love Sausage.
Despite this victory - which takes both planning and luck on the Boys' part, Stormfront’s DNA was the basis for creating Homelander, and he has strength comparable to the flag-wearing uber-villain. Stormfront is easily the mightiest in raw strength and power output, and would likely be able to massacre Malchemical and even Godolkin's assembled G-Men, though Homelander's heat vision is presented as a far deadlier long-range weapon than his forebear's electric breath, and he seems much more durable, once again showing why he's easily the deadliest supe in the show and comics.