I saw Lisa Loeb several years ago, and I think she's a great songwriter.
I really like Sarah McLachlan, even though she's Canadian!
Speaking of Canadians, I guess my favorite is Joni Mitchell. Here's a great clip of her with Pat Metheny and the late Jaco Pastorius. I've never seen her live, but would love to.
One of my favorites over the years is Chrissie Hynde of the Pretenders. "Brass in Pocket" is my favorite Pretenders song.
Another of my favorites is Bonnie Raitt. Her concert is one of the best I've ever seen. When I saw her sing this song, you could have heard a pin drop in the place. She's also one of my favorite slide players.
One of my favorite Blues Gals is Candye Kane. I had the fortune to meet her several years sharing a bill with Marcia Ball and Kim Wilson. She's great, and this is a great clip with Steve Wilcox on guitar and the great Sue Palmer on the piano.
I also like Susan Tedeschi and would enjoy seeing her live sometime.
And there are many, many more where these gals came from.