Countee Cullen (1903-1946) was an African-American poet of the Harlem Renaissance period. His works are thoughtful and sad and beautiful.
Here's one poem that I find wrenching:
Once riding in old Baltimore,
Heart-filled, head-filled with glee,
I saw a Baltimorean
Keep looking straight at me.
Now I was eight and very small,
And he was no whit bigger,
And so I smiled, but he poked out
His tongue, and called me, "Nigger."
I saw the whole of Baltimore
from May until December;
Of all the things that happened there
That's all that I remember.