I just sold a fantasy lesbian romance with a half-white/half-Penacook protagonist, so I'm getting a kick...

There were a couple of black minor characters, but I can't really count them in this case, seeing as they were not important and slaves. Then again, it was set during the Revolutionary War, so free blacks were rather rare in Boston.

Still, this is a rather good point, and not just for fantasy. I can only think of a few sci-fi stories as well, with non-white major characters. Most of them are from Heinlein...