No one is more ballsy than Batman/Superman/Captain America, because they're so far removed from anything that's realistic and human. They could stop multiversal explosion by willpower alone, just "because". So their "ballsiness" doesn't mean anything, it's not worth a damn.
Those jokers aside, Constantine is relatable and (at least pre-JLD) human-like. He has fears, moments of weakness, etc. His ballsiness means a lot more.
There's also Animal Man 🙂
Originally posted by Digi
So Constantine is good. And Doom. The Doctor (Who) as well. He's stared down sentient suns, universal reality warpers, and entire pantheons with nothing but his wits and sonic screwdriver. Obviously he's a prep god, but removed from his TARDIS his base is probably low meta at best (if we grant him some of the screwdriver's more obscure feats and powers).
^Mothaphucka's probably been waiting all day to bring up Dr.Who.