Quote Originally Posted by amat
THIS IS A JOKE! Everyone knows who the best Rocky opponent was, Apollo Creed! Not only did he have the best entrance in the history of Rocky, he stuck around the longest. Clubber? A flash in the pan. Drago? He was the guy who an OLD Rocky beat. Tommy Gunn, don't make me laugh. Mason Dixon? Please....

Without Apollo Creed, there is no Rocky Balboa. Clearly the best opponent outside of Thunderlips of course. Then comes Clubber, Drago, Dixon and then Tommy Gunn.
Got to agree with amat on this one. He may not have been as menacing in the classical since, but was more figurative in everything that Rocky had to overcome. His lack of consistant training, no real quality sparring partners, everything was against him. When he fought the other guys he had everything that he needed.