Magic, Bird, MJ, Duncan, LeBron
I know the mountain doesn't have 5 faces on it, but I feel like Bird and Magic count for one since they more or less shared that era. Those five account for the major eras of the sport since the merger.
I know we can and should talk about Russell, Wilt, Kareem, Jerry West etc ... all great pre-merger players (Kareem was part of both). I guess I just feel that the sport was so different, the league was so different, the talent pool was so different ... they belong in their own category.