Biddy Mason. Great story. Born a slave in 1818, her owners got converted to Mormonism and headed west. The other Mormons pressured her owner to free her, but he wouldn't. So she fought for her OWN freedom in California court, and won. There she became a nurse and midwife, one of the first black land owners in LA, amassed 300k which she gave liberally to charities, and founded churches, schools, and aid societies.
An American Hero you may not remember: "My father was a slave and my people died to build this country, and I'm going to stay right here and have a part of it, just like you. And no fascist-minded people like you will drive me from it. Is that clear? -- Paul Robeson (1898-1976) during his testimony before the House Un-American Activities Committee, June 12, 1956