Thanks for the suggestions, everyone! I'll definitely be checking them out. Sorry... I'm a little behind. I posted the entries on my artist page and forgot to link the others or post it here.
Sunday's musician was pianist composer Margaret Bonds. She's most known for her choral works, but she also wrote for piano. In fact, my father's favorite piano piece - period - is "Troubled Water", an arrangement of the spiritual Wade in the Water.
Here's her bio at Afrocentric Voices:http://www.afrovoices.com/bonds.html
It's not super detailed, but it does give a slight hint to the racial inequality she faced as a student at Northwestern University.
And wikipedia - which doesn't do her justice at all: http://en.wikipedia.org/wiki/Margaret_Bonds
I was actually surprised to find so few of her pieces on YouTube. Trust me, if you find "Troubled Water" or the choral version of "The Negro Speaks of Rivers", listen to them both! Also recommend "Hold On."
Here's Minstrel Man:
And You Can Tell the World: