Best Male Singers of the 20th Century


There is an interesting current discussion about the best female vocalists on CD. I have my own ideas about the best male singers (any category) of the 20th Century, but would like to hear other opinions.
sdcampbell
Classical/Opera = Luciano Pavarotti
Standards/Nightclub = Frank Sinatra
Ballads/Rock = Roy Orbison
Jazz = Louis Armstrong
Country = Jim Reeves
Christmas = Nat King Cole

Did smoking have something to do with it?
I am surprised no one mentioned Greg Lake. Maybe I missed it. As far as Fogerty?

Puleeze.....
Sam Cooke, Dean Martin, Sinatra, Marvin Gay, Tony bennit, Smokey Robinson and I LOVE the Ames Brothers....So many singers today can harmonize...its a lost art.