It's tough to say. I don't think he counts as a super hero, at least in the traditional sense, but I really want to say Rorschack. Rorschack really piqued my interest because I love insanity and psychology, and anyone who knows who I'm talking about will know hes not exactly right in the head, but hes still pretty damn cool. I'd list Dr. Manhatten from the same comic, but I guess he gets knocked off simply because (SPOILER ALERT! Highlight to read) He kills Rorschack. I understand that Rorschack was going to muck things up, but I still didn't want him killed
Thinking on the more 'classic' super hero path, it would be a three way tie between The X-men (About 90% of them ) Batman and Iron Man.
Id like to say that their are three super hero's who may have everyone else beat..
1. The Sentry.
2. The Hulk.
3. Wolverine.
To be honest these are the most powerful superheros.. The sentry has the power of 1000 exploding suns. The hulk can basically never die.. and wolverine and his metal skeleton are indestructible.