TIL: Today I Learned...

You forgot Ethel Waters. You could maybe include Crack the Sky. But still no. You know I love my Bawlmer, Murlan, hon ..... but New Orleans is the shiznit for music.
Crack the Sky was actually from Weirton, WV. Their excellent eponymous first album had problems with distribution nationwide, but for some reason Baltimore got an inordinate amount of the available albums, hence their popularity in the Baltimore area. Sadly, following the distribution gaffe the band never gained national notoriety.