I dunno. Don't rule out Ultimate Beast so quickly. I know he died, but he did pretty much get directly blasted by the uber powerful eyebeams of a ginormous and powerful sentinel. That, and basically half of the entire ceiling of the government building he was at collapsed on top of him. He was still smoking and even had a small flame on his fur.
Anyway. He's shown that he's quite powerful and tough. And smart as hell.
And Ultimate Iron Man sure didn't impress me when Wolverine first beat the hell out of him, and then Colossus whooped on him even harder.
And Giant Man was crippled by a lone Captain American, even without his shield. I think Beast could've done all the same moves that Cap pulled off against him.
I'm not saying who wins or anything, but perhaps give it a bit more thought than before.