Cool thread. I'll have to check some of these ladies out.

My list, heavy on the 1990s:

Juliana Hatfield (solo, Blake Babies, Some Girls)
Tanya Donnelly (belly)
Liz Phair
Alanis Morrissette * THE most powerful voice I have heard in person.
Shirley Manson
Natalie Maines
Chrissie Hynde
Deborah Harry
Johnette Napolitano
Dolores O'Riordan
Sarah McLachlan
Dolly Parton
Pat Benatar
Natalie Merchant
Jenny Lewis
Feist

Bears, beets, Battlestar Galactica.