<<Heck, Silver Surfer wanted to be free of Galactus's barrier, and after absorbing Hulk's energy, he broke through it.>>
i forgot about that one! damn good post, cc. that's what people always forget -- the hulk's strength is not 'physical' and is not regulated by 'physics'. that's why strength battles will always go to the hulk -- eventually.
Hulk's strength is potentially limitless...potentially. His greatest feat is still that mountain from Secret Wars. Thor lifts the Migard Serpent, which weighs as much as the Earth, and Surtur's sword Twilight, which has the mass of a White Dwarf Star. When is Hulk going to do something that truly shows this limitless people keep saying?
This goes on and on - would it settle it to say Hulk MAY be stronger, but Thor IS more powerful overall? No. Anyway this isn't arm wrestling, even though Thor has stalemated Hulk in a test of strength that lasted an hour, in Defenders #10. Thor, like Superman, has too much versatility in his attack for the Hulk to truly overcome. Thor uses everything he has, he wins.