Lebron, and it's not even close. Dwight Howard is a great defensive player, and clearly, you want a great defensive center in the playoffs, but his offense isn't nearly what James' is. Howard has played with some pretty good players to achieve with his post season success, while James has been a bit of a lone gunman. Seriously, who's the second best player on that Cavs team last year? Mo Williams? Dwight had Hedo, Nelson, and Lewis.