"The greatest composer you never heard of..." Florence Price-- Black and a Woman...
Two slams to make sure she's unheard of but over 300 compositions and kudos by orchestral groups and a place of fame with the Chicago Symphony.
https://www.classical-music.com/composers/guide-florence-price/
Florence Price made significant friendships during the 1930s, including with the pianist and composer Margaret Bonds and the contralto Marian Anderson and the writer Langston Hughes. Anderson, who had sung her spiritual arrangement of My Souls Been Anchored in the Lord in a broadcast from Prague on 6 May 1937, performed the song at the end of her programme at her renowned Lincoln Memorial concert on Easter Sunday in 1939. With 75,000 people attending the performance and many more listening on the radio, Price won overnight fame.
So its something of a mystery as to why Price couldnt get her First Symphony published, despite nationwide performances. It spurred her on to send a letter to the conductor of the Boston Symphony Orchestra. My dear Dr Koussevitzky, she wrote. To begin with I have two handicaps those of sex and race. I am a woman with some Negro blood in my veins. Knowing the worst then, would you be good enough to hold in check the possible inclination to regards a womans composition as long on emotionalism but short of virility