Whoa my favorite topic!!!
So there are two categories here. One is western where we have Marvel and DC and second is Anime where we have the Dragon Ball Z, My Hero Academia and One Punch Man.
In Marvel and DC my favorites are Iron Man and Batman. Iron Man due to Robert Downey Portrayal and Batman from Christian Bale trilogy. Epic are both the heroes and different from the rest.
In Anime we have the legendary Superhero who is the only fictional superhero to motivate Human beings, the one and only Son Goku from Dragon Ball Z. In recent times we also have a superheroes like Saitama from One Punch Man who is claimed to be most powerful hero in Anime world and secondly on the same lines we have Izuku Midoria (Deku) from My Hero Academia who is still in his 20s but with great power and responsibility.