Wonder Man VS Hulk
What about that?Wonder Man was able to broke adamantium Ultrons through throwing them with so many force that their internal circuits explodes and the adamantium was broken from inside.
He was able to withstand in fight against Thor, ans his ionic energy grants him no limit stamina, also he's Class 100, don't know in which level of Class 100 he is, but probably on the strongest.Also he possess unbelievable resistance to injuries, superhuman reflexes and reaction time and he can fly, and ionic energy projection.And last but not less important, he's a smart guy.
On the other side we have Savage Hulk, we all know his powers, madder he gets, stronger he gets, anyway i think that Professor Hulk would be a greater challenge cause anyway he can become stronger and his one of the smartest beings on the planet.