Who do you prefer? Batman. Superman. Spider-Man. need to write-in for Wolverine, or none of the above?
(Why? What about you determines that preference?)
As I noted nearby, my martial arts friends all said Batman, as do I (Wolvie is second) and I think that's because we were all "made" fighters. It takes a different sort (especially from krav maga) to believe in born or mistakenly acquired strength.
And Wolverine is just hot, so...