Obviously far, far, far too many to mention, but a random selection of (IMO) Good singers in no particular order;
Tony Bennett
Julie London
Tom Jones
Pavarotti
Elvis Presley
Aretha Franklin
Roy Orbison
Joni Mitchell
Nina Simone
John lee Hooker
David Ruffin
Peter Gabriel
Hazel O'Connor
Eva Cassidy
Ray Charles
Joe Cocker
Carol Carpenter
Frank Sinatra
Ella Fitzgerald
Bob Marley
Billie Holiday
Nat King Cole
Enya
Sarah Vaughan
Paul Weller
Freddie Mercury
Errol Brown
Al Green
Tracy Chapman
Sam Cooke
No doubt I could easily add 100 more names to that list