I think the OP was dreaming up realistic sceanrios involving players outside the Top 20. Of course Bron and Howard, Bron and Garnett, or Bron and Wade would be championship favorites, but how would Cleveland make that happen?
Just throwing this out there, but does James make the people around him worse? Wally, Wallace, Gooden, and Hughes got worse after arriving. Boozer did not blow up until he left. Mo Williams will be an interesting case study this season, since everyone expects the pairing to work well.
Before you point at the assists, keep in mind that Starbury average 10 twice during his career.