15 Greatest Marvel Comic Book Villains Of All Time

4. Loki

The God of Mischief's feelings towards his brother Thor have inevitably led to him clashing with The Avengers on multiple occasions, and it was actually one of his earliest schemes which led to the heroic team forming for the first time. While that may have backfired on Loki, he's got revenge many times in the decades which have followed, often working behind the scenes in an attempt to bring down Earth's Mightiest Heroes.

While he's had something of a change of heart in recent years after serving as a member of the Young Avengers, Loki will no doubt soon find himself once again drawing the ire of The Avengers as he plots to destroy Thor! After all, he's always working on some sort of dastardly plan, and while his motivations are forever changing, the jealousy Loki feels towards his brother is unlikely to disappear any time soon.