Stephen Foster wrote a couple of good ones that were about Negroes.........

Uncle Ned.........there was an old kneega and his name was Uncle Ned, he lived a long time ago, and he had no wool on the top of his headin the place where the wool ought to grow.

Old Black Joe......I'm coming, I'm coming, for my head is bending low, I hear dem gentle voices calling, Old Black Joe.
https://youtu.be/H6Tvq_0tkyw