Ray Charles
Aretha Franklin
Frank Sinatra
Tony Bennett
Ed Trickett
Carmen McRae
Ella Fitzgerald
Richard Hidalgo
Roy Orbison
Tony Williams of the Platters

Anyone want to add another 10? I agree on several of yours, Folke E, although I haven't heard of some of them. By the way, I had a friend many years ago named Folke Johansen. As far as I can remember he didn't like folk music.

Jerry