That's a question really hard to answer. Different players play different position. But then I will say Kobe, then a few years later James.
Iverson shouldn't be on the list. He's not as good as he used to be.

__________________
“The guy said NBA players are one in a million, ... I said, 'Man, look, I'm going to be that one in a million.'”
Kobe Bryant

"I don't need too much. Glamour and all that stuff don't excite me. I am just glad I have the game of basketball in my life."
LeBron James

"People have always doubted whether I was good enough to play this game at this level. I thought I was, and I thought I could be. What other people thought was really always irrelevant to me."
Steve Nash