Well, for starters there's Ferron.

Then there's Heather Bishop, Holly Near, Meg Christian, Cathy Fink, Marcy Marxer, Lucie Blue Tremblay, Catie Curtis, Tret Fure, Cris Williamson, Teresa Trull, Penny Lang, Judy Small, Janis Ian, Judith Kate Friedman, Toshi Reagon...