Well, I have always been partial to their cover of Fleetwood Mac's
'Go Your Own Way' but then I am a little sick and twisted.
On a more serious note, there are a number of female rockers you are forgetting...
Joan Osbourne (pretty sexy too)
Terri Clark
Margo Timmins (Cowboy Junkies)
Sheryl Crow
Bonnie Raitt (taught slide guitar by the Great Willie Dixon)
Alanis Morisette
Ani DiFranco
I think the above are all considered to be serious artists.
By the way, apart from being a rockin' guitarist, Suzi Quatro is also a champion clay pigeon shooter.