(sorry, I keep adding to this list!)
Well, since other people have mentioned artist's that are not rock....
Willie Nelson - I adore him, so laid back mellow,
beautiful song interpreter
Kris Kristofferson - Very unique, great song
Waylon Jennings - Rest in peace...
Johnny Cash - Hello?
Hmmmm, just named the Highwayman too
Kenny Rogers - C'mon!!!
Conway Twitty - "Hello Darlin..'"
George Jones - "The Possum"
Sorry, my mom has been a huge influence on my musical taste, love Country & Western.
Ella Fitzgerald - my favorite singer of all time!
Sarah Vaughn - warm, rich "Sassy"
Mel Torme - "The Velvet Fog"...so many more I'm sure, I could go on. Ok, back under my rock now!