I have lost track of all the Hulks. Can you summarise them and describe them?
green hulk -the one you know, strongest one there is - has no limit. in world war hulk he was angrier than ever, and basically beat every single marvel character (except thor who was dead)
red hulk - noone knows who he is yet (but he is not the banner/green hulk), but he seems stronger than green hulk at base level, and killed the abomination. he beat thor, and hulk seperately, but both came back and in the end hulk was too strong as he got madder and ko'd him.
thor and hulk have always been the big hitters (2 strongest). thor is weaker than hulk strength wise, but controls the hammer and lightening, hulk is strongest one there is bar none, and marvel will never allow one to beat the other for fear of fan backlash.
but we all know hulk would kick thors ass