Are we going by most useful vidoegame wise?
In that case...
PG: Chris Paul. His 84 3pt rating makes all the difference in the world in deciding whether or not double teaming David West is a good idea...
HM: Derrick Rose. His 77 mid and 79 3pt makes him an inconsistent threat with his jumpshots. But get him a few easy layups and a couple of trips to the foul line? His jumper is straight cash.
SG: Kobe. His post game is ridiculous. Coupled with the fact that most Sg don't have the strength nor the post defense necessary to stop it? Makes Kobe the most complete SG in the game.
HM: Tyreke Evans. Don't laugh. A couple of OS'ers on here know just how dangerous Tyreke Evans is when going to the rim. Couple that with his insane crossover/isomotion ability and one of the quickest releases in the game making it nearly unblockable? Yeah. Tyreke is a problem.
SF: Carmelo Anthony. Bigger, Stronger Kobe with a better 3pt rating. He is simply unfair in this game.
HM: Rudy Gay. Don't laugh at this either. Dude is absolutely insane when going to the rack, and he catches on fire very very very quickly. Hit a couple of midrange jumpers, and I bet you at the end of the day he'll end up with 40+ points.
PF: Dirk. His post fadeaway is simply cheese
HM: Kevin Garnett.
HIS post fadeaway is simply cheese
C: Dwight Howard. Simply unfair. Can't be guarded one on one. He will simply bully his way to within 3-5 feet and dunk it. Everytime. EVERY. TIME. Asssuming he establishes good post position first, but then...that's what the agressive backdown is for....
HM: DeMarcus Cousins. Mini Dwight. With a mid range game. His mid range is a 75. Simply unguardable if he's facing a scrub center. Expect him to get 20+ points.