The correct answer is none of the above. None of those guys were heavyweight champ. Linear is the only thing that counts. Anyone can make up an alphabet belt. Beating the man that beat the man is the only thing that deserves recognition.
Tyson scared the crap out of seldon that's why he stayed down in their fight. seldon also said he's satisfied with his belt and don't want unification at that time. a real champ wouldnt say that.
I never knew that Bobby Czyz was Heavyweight champ. I knew he was lt Heavyweight Champ and I think Cruiserweight Champ.
Czyz was Lt Heavy and Cruiserweight Champ but never heavyweight.