Tough call, but probably Batman. I loved that his "superpower" was really his brain. He was that smart, disciplined, and prepared. I always took him as a role model of sorts. Still do, actually. It's one of the reasons I EDC. (Look it up.)
The Dark Knight has great performance from Heath, but I like The Dark Knight Rises more.I really liked Christian Bale's Batman.
Batman doesn't really have a superpower. He's just a billionaire with toys. I like his interpretations from Batman Begins forward. If you play Arkham games, you'll love the character more. Especially with the way Rocksteady build the Arkham series.