What we need, may come in the form of 2 or 3 players. We many not get everything in one player, in fact, I doubt we will.
I would say one of DA's hardest decisions is, do they attempt to move Sully, or pray he gets his conditioning under control. If Sully steps up and really improves his conditioning, the celtics can look at the Center, and Small Forward positions. That would make things much easier, rather than replacing the entire front line.