OK, stand back boys.
Bonnie Raitt ( as a few have said) Carolyn Wonderland, Kelly Richey, Ruthie Foster, Eva Cassidy (again, 'nough said). A few great Blues/Guitar singer/songwriters.
Stevie Nicks for sure as noted. Then there's Ann and Nancy Wilson from Heart. I think Ann's voice is better than ever and if I could play as well as Nancy then I'd be a happy girl.
Cyndi Lauper has a great rock voice. Diana Krall for jazz. What about Pat Benatar! Wow, can she sing. I mean the list can go on and on......Norah Jones, Amy Winehouse, Duffy, Kate Rusby, Brandi Carlile, Pink has a pretty great blues voice on her too, Chrissy Hynde for sure, Sarah McLaughlin, Sarah Harmer, Sara Slean (all three Canadian ) Fiona Apple, Tori Amos, Alana Davis.......There's a start.
That's All Non-Violence is
--- Organized Love---
Joan Baez