Today I discovered Jo Ann Kelly and her music, surprised to have never heard of her before now. She missed out on fame and fortune, despite her great talent, because she abhorred business in connection with music. She was well recognised and feted by her contemporaries, including Tony McPhee, Canned Heat, Danny Kirwan, and John Dummer.
Some scant details here at Wikipedia. This is a 45-song overview of her recordings from 1964 to 1988. She died in 1990.