As a small-ball four, we're borderline contenders with George. You add a Horford or something like that next to him, and we're a top-3 team in the league I think. This lineup could win the title, in my opinion:
PG: IT, Turner
SG: Smart, Bradley
SF: Crowder, JJ
PF: George, KO
C: Horford, Zeller
Also, you'd have to think we'd get even better defensively by replacing Sullinger and Amir with George and Horford, so that team would be absolutely ridiculous on both sides of the floor, especially offensively with as much shooting and space you provide IT, Smart, and George to penetrate the lane with.