Originally I was thinking a Crusader + Binder who binds celestials, but that might work better as a pact-magic base class. I feel like barbarian + wilder has been done to death, but maybe I could put a new spin on it. Bard + Dread Necromancer or Bard + ToB could be fun (wailing banshee or dirgesinger reboot for the former, either dance-combat or sword-singer for the latter), but so could Factotum + Warblade or Wilder + Marshal.

I already used Barbarian + Truenamer in a contest, sadly. Even if I wasn't happy with it.