Seen her a couple of times live. Definitely in my top 10.
Patsy Cline is still # 1 IMO.
But Patty Loveless, Martina McBride, Leeann Rymes, Allison Krause and the Commie Libertard c.unts like Ann Wilson, Emmy Lou Harris, and Linda Ronstadt would make my list too.
Honorable mention to one of my personal favorites Rosanne Cash.