Wow, this thread refuses to die..
Well, I'm in with quanchi on this one.. To restate my reasons:
1. Sentry overpowered Molecule Man.
2. Tanked an attack from Terrax the same way Thanos tanks herald level attacks. (And yes, Surfer did defeat Terrax pretty easily too.. But the thing is, Surfer would feel Terrax's attacks. He would not simply wade through his attacks as if they don't matter.)
3. In his original mini, his Void persona was snapping Hulks ribs one at a time. And both Thor and Dr. Strange were fairly certain they were dead meat....
4. He held off another group of heroes, with Dr. Strange being among them and his magic being ineffective.
5. Than there's what he did to Ares in Siege, simply ripping him in half.. That's a feat of strength well beyond your normal Thor.
I realize Thor killed Sentry.. But Sentry did ask to be killed. And it was foreshadowed in Dark Avengers that the only way Sentry could die, is if he allows it to happen..