A guy who probably deserves more consideration than he gets is Booker. 26 / 5 / 5 on a team that's on pace for 66 wins or so.
I think his name not coming up is partially due to Kiorrik's theory: voters attribute the Suns success to a team effort, rather than one player carrying them to victory. Also, of course, many give CP3 a ton of credit there, which by extension lessens Booker's perceived impact.