15 Greatest Marvel Comic Book Villains Of All Time

15. Kang The Conqueror

Time travel is a headache inducing concept in any form of storytelling, but that's particularly the case in comic books. Kang the Conquerer however is someone who has made good use of his ability to travel through time to make The Avengers' lives a living hell, and he's actually succeeded in both conquering the Earth and at one point destroying it altogether (as you've probably already guessed, time travel was later used to undo both of those moments).

With a fascinating backstory which actually saw him serve as a heroic member of the Young Avengers as Iron Lad, Kang is one of Marvel's most complex and delightfully evil bad guys, and the way he manipulates time for his own means makes him a threat not just to Earth's Mightiest Heroes, but reality itself.