I think I'd roll with Asura.
this thread got me interested in this Asura character so i looked him up lol (4 1/2 hours of youtube video later and here's what i think). Asura at his best appeared to be The Destructor! And The Destructor was battling some kind of high level cosmic buddah guy who made galaxies floating around him look like snow flakes...and WON. I dont think hulk stands a chance here as much as i love the character.