Dr. Daniel Hale Williams is often described as the first person to successfully perform an open-heart surgery. That's not entirely accurate, but he was still a surgical innovator, and he was also a huge part of the Black Hospital Movement.
Research:

Behind the Scenes Minis: Smashing Linoleum
19:47

Frederick Walton and the Invention of Linoleum
41:32

Swing Riots
36:33