I definitely think Aaron Gray should be considered if the $ is right. Same can be said for Reggie Evans, but I doubt he is taking a one year deal @ 31/32 yrs old. I think Evans would create fits for Bosh, Horford, KG, Boozer, while letting Amar'e do his thing.
I honestly am not too confident in Jordan or Harrelson in their 1st yr and Turiaf will probably be injured half the yr. If possible, I'd love to see Jeff Foster (should be cheap) and Gray be brought in together. Turiaf comes off the bench, where he is the most effective imo, and Foster could back up Amar'e against bigger squads and Shawne Williams could come in @ the 4 when they play small ball. I think it'd be a nice rotation, given what's available.
Gray is a big dude and could start against Howard, Bogut, Hibbert, Lopez, etc.. and Foster could start against the althetic bigs - KG, Pachulia, Horford, Noah, Okafor, Bargnani, etc...
PG Billups, Shumpert, AC (hopefully)
SG Fields, Douglas, B. Walker
SF Melo, Shawne Williams, D. Brown
PF Stat, Foster, Harrelson
C Gray, Turiaf, Jordan, Harrelson
Tommy Dee also mentioned another guy who could provide some nice bench scoring and back up the 4, Josh McRoberts. Looking at that lineup, it seems to lack frontline scoring, though I think given our stars offensive prowess and the way they would matchup size-wise to Miami, Boston, Orlando and Chicago looks pretty good.