1 Steph
2 Lebron
3 Green
4 Leonard
5 Westbrook
Steph is a shooter/scorer in a way we've simply never seen before. He can't be guarded without completely giving up defending someone else. Lebron is still probably the best all-around player in the league, but his body simply can't do it all the time (must be rested, must be motivated). Green is the best defender in the league - Leonard may be the best one-on-one, but Green impacts the most shots in the most positive way - plus he's got PG handles and vision along with a burgeoning outside shot. Leonard is the best one-on-one defender in the league plus top 10-15 as a scorer (though not a great creator). Westbrook is a mini-Lebron, and if he played better defense he could be the best player in the league.
Next five, unordered:
Durant, CP3, George, Harden, Davis (this was a down year for his terrible teammates, but I won't say he's actually gotten worse)