Chris have you heard of Michael Holbrook Penniman Jr. aka Mika? This guy should be the Freddie Mercury replacement for Queen!
I'll pick some jazz vocalists.
Older:
Frank Sinatra, Louis Armstrong, Johnny Hartman
Newer:
José James
Leonard Cohen - Voice improved with age. Live in London v.1,v.2 are excellent. He is relaxing as well as sometimes toe tapping and always thought provoking.