I believe Wile E. Coyote must be the greatest super hero ever because no matter what the Roadrunner (beep, beep) does to him, he keeps coming back and trying again.
Super hero? Probably Batman even though he isn't "super", but that's probably why I like him so much, he's human that uses intelligence to best the toughest of the tough.
Coolest would probably be Jason Todd for me, although he's more of an anti-hero.