It always amazes me how everyone seems to doubt the all time greats. Players like Wilt, Russ, Kareem, Bird, Magic, LBJ, MJ, would dominate any era. You can make arguments that they would have dominated specific eras more or less but they would still be dominant players.
Many people feel that the players make the era but I would argue the era makes the player. Does anyone really think that Bird would not be shooting, and making, a ton more threes in today's game? Would the use of more comprehensive stats show how dominant Wilt really was? I mean, blocked shots were not even kept when he played and an assist was evaluated differently. How dominant would Kareem have been had that circle beneath the basket been there when he played?
Players adapt to their environment, not create it. They play under the current 'system' and their games are molded to play in that system. I guess the truly dominant players are the ones who cause the league to change the system due to their dominance. Wilt is the player who comes to mind the most here.
It's early and I am rambling but maybe it's 'transcendent' players we should be discussing. Those players whose abilities would work well in any era? At any rate, I still argue that these type players will do just as well in any today's game and adapt their games to fit it.