I personally much prefer the raspy-voiced vocals of singers such as Stevie Nicks, Bonnie Tyler, Doro Pesch, and Joan Jett (to name a few) over the clear, smooth *singing* vocals of most female vocalists. It makes the music seem edgier and gives it some attitude, as well as enhancing the emotional content. How come you don't see vocalists with this singing style anymore? Everything seems so cookie-cutter and bland now. Is it a temporary thing or was that type of attitude-driven singing style just a fad among female vocalists?
Alannis Morrisette has some raspy pangs occasionally and has smoe mildly interesting lyrics. Another Canadian, Diana Krall, is a jazz singer who describes her voice as 'scotch and gravel enhanced.' While she's a jazz singer, she's married to Elvis Costello so some of her orginal stuff is pretty cool. I always got a kick out of listening to Janis Joplin - it would have been amazing to hear her sing live! What about Anne and Nancy from Heart? They can wail with the best of them!
Sadly, I'd have to say that Miley Cyrus is one of the few raspy singers nowadays. HOWEVER, she should never be put into the same category as the women you stated. There's just no comparison. I think the style of music these days wants the women who can do vocal rollercoasters. Shame, because music back then was SO awesome.
Also, Scarlett Johanssen (sp?) has a record and duets out, and she's fairly raspy. Not too bad actually.