Ideally you still pair him with a defensive minded C. Even if we were to go after and get Al or Bosh I still think we would be looking at Defensive 5s like Emeka, Chandler etc.
This of course would be the key. You need inside scoring jsut as you need defense. Your inside scoring, as well as your rebounding, would not be secure. You have your slasher. You have a pack of scrappy defensive minded shooters at the 2/3. ALL you need at that point is one last piece: the defensive center. While you ae waiting to get him, you are already quite good. You are very young, so you will get better still. And you have one solitary piece to compelte your puzzle. Few teams can say as much:
C - ?????????? (defense, rebounding)
PF/C - Jefferson (post game rebounding)
PF/C - Thompson (rebounding) (or Hawes -- post game, skills)
SF/SG - Greene (defense, slashing, shooting?)
SF/SG - Casspi (scrappy, shooting)
SF/SG - Garcia (scrappy, shooting, ballhandling)
PG/SG - Evans (slashing, defense, post up guard)
PG/SG - Udrih (shooting, ballhandling)
deeper:
SF/PF - Nocioni
PF/C - Brockman
PG - Rodriguez
I've posted that lineup before. You can't solve all of your team's needs in one move -- Hakeem is retired, and even if he were not he would nto be available. But if one of the big young elite PFs is available for the expected price you can get yourself
within one move. You have to keep on the building. But there is a clear path here. One trod by many an elite team over the years. We did it once with Webb actually -- he was not a serious defender when he arrived, but the closer he got to winning the better his defense got. Who knows with Al, but I do know that he has been on one long series fo depressingly bad teams since he arrived in the league. Its a sing he can't carry you by himself. Its also opens the possibility that in a better environment, on a team going places, his effort picks up. I won't even accept any pooh poohing of that from most of you, as the exact same argument is used with Kevin all the time on here.