4. Thor (Marvel Cinematic Universe)
Thor has now appeared in two Marvel Cinematic Universe movies and is set to appear in a third this winter and he is, without a doubt, one of the most powerful heroes in comic book movies. Thor's physical strength is on a par with the Hulk's, if not quite as great - he blocked one of Hulk's punches with some effort - and he is stronger than Tony Stark in his Iron Man armour. In terms of his durability, he can take a beating from the Hulk and walk away relatively unscathed, while his head-butt to Iron Man did more damage than Iron Man's head-butt to him. He can also fly, but it is his more esoteric powers that make him truly impressive. His hammer, Mjolnir, can create powerful whirlwinds when swung - enough to lift the Destroyer Armour off the ground, and he can summon powerful bolts of lightning that can take down the Chitauri's enormous space whales in one blast.