James Baldwin and Audre Lorde come to mind immediately.

Here are some lists with more:

https://www.nbcnews.com/feature/nbc-out/black-history-month-17-lgbtq-black-pioneers-who-made-history-n1130856

http://www.glad.org/post/honoring-black-lgbtq-icons/

She's largely been forgotten now, but she did it first, best and boldest: Gladys Bentley. Have a look and a listen
You'll be glad you did.