I don't know if any of these women qualify as Top 100, but in the name of diversity:
Ely's list:
Etta Baker
Memphis Minnie
Bonnie Raitt
Joni Mitchell
Joan Jett
Rolling Stone list:
Joan Jett
Joni Mitchell
ADD:
Libba Cotton
Melissa Ethridge
Cheryl Crowe
Cyndi Cashdollar (OK, "slide")
Charo (no joke)