I'll go with Julius Irving or Dr. J. He was about 6'6" but with his fro stood about 6'11". Always classy and even tempered. I only saw him play once in person back in his ABA days. I saw him play in the Greensboro Coliseum with the Nets. They were playing the Carolina Cougars and Cougar Billy Cunningham who could jump out of the gym himself stole the ball about half court and went down to score an easy basket but Dr. J was trailing him and instead of dunking the ball Cunningham put the really ball high off the glass in a lay up attempt. Dr J. pinned the ball against the back board and got a goal tending call. The crowd went crazy because of how high both players went up. OFC