May I recommend Kathy Mattea? I saw her in concert for the first time 30 years ago this August and a couple of dozen times since. She puts on a great show, full of funny stories and slightly off-color asides, and of course that rich voice (lower in register now but still a pleasure to listen to) and consistently outstanding backing musicians. These days, her shows are more folk/gospel than country, although she still plays plenty of hits and personal favorites from her chart-topping years. Definitely worth the price of admission if she's in your area.