Tenchi Masaki. Guy gets killed he wipes out entire third dimension while ascending to a power/dimension beyond what his own universes gods was...
Sai Akuto 100% mana manipulation super stegnth limitless magical power and BORN to kill gods.
Negi Springfield. Pure lightning form borderline immortal as well as semi demon forms.
Rahxephon a reality tuning unit able to alter reality at will.
I could go on and on. Also marvel comics kinda toned Thor down for their version. These guys could quite likely stop the norse one.
---------- Post added 2013-01-20 at 11:22 AM ----------
Yeah pretty sure the hulk is.
And yeeeah if they won't listen AND have the power of gods or more then yeah even the doctor would have trouble.