Popular Male Singers in the past Half Century...

Hi, can you name 20 most popular/favorite male singers (vocalist, artist) from 1960s to now?

I'd like to collect some CDs for these singers. Would you recommend some albums (songs) for these artists as well?

Thank you.
Here's a few of my favorites:

Jackson Browne
Don Henley
Jim Croce
John Mayer
John Fogerty
Elton John
Bily Joel
John Lennon
Paul McCartney
George Harrison
J.D. Souther
Glenn Frey

There are many more...
Roy Orbison
David Byrne (Taking Heads)
Milton Nasimento (Brasil-falsetto vocals)
Tom Waitts
Udo Dirkschneider (Accept)
Kenny Logins
Joao Gilberto
Louis Prima
A few more I forgot:

Gram Parsons
Eric Clapton
Steve Winwood
Van Morrison
Elvis Costello
Donald Fagan
Rod Stewart
Joe Cocker

Plus many more
A few personal faves (with recommended tracks). Some are pretty well known, others pretty obscure, but I really like all of them. No guarantees, but you might, too.

Daryl Hall (Hall & Oates) - Sara Smile
Norman "General" Johnson (Chairmen of The Board) - Gimme Just a Little More Time
Todd Rundgren - Hello, It's Me
Matthew Sweet - I've Been Waiting
Freedy Johnston - In The New Sunshine
Gregg Alexander (New Radicals) - Someday We'll Know
Brandan Benson (Raconteurs) - A Whole Lot Better (solo)
Marshall Crenshaw - My Favorite Waste of Time
John Croslin (Reivers) - Other Side
Lindsey Buckingham - Big Love
Chris Stamey (dBs)- She Was The One (Holzapple/Stamey)
Brian Wilson - God Only Knows
Kyle Davis - Buried Alive
Parthenon Huxley - Every Minute
David Eugene Edwards (16 Horsepower) - Black Soul Choir
Web Wilder - Streets of Laredo
Alejandro Escovedo - Five Hearts Beating
Alex Chilton (Box Tops) - The Letter
Doc Watson - Don't Think Twice, It's All Right
Bob Delevante (The Delevantes) - This Engine Runs on Faith
John Hiatt - Have a Little Faith In Me
Brian Henneman (Bottle Rockets) - Waitin' On a Train
Raul Malo (Mavericks) - All You EVer Do
Don Dixon - Inside These Arms
Mark Oliver Everett (Eels) - Grace Kelly Blues
A couple I haven't seen mentioned yet:

James Taylor
Dan Folgelberg
Jon Bon Jovi
Eddie Vedder (Pearl Jam)
Chris Cornell (Soundgarden)
James Hetfield (Metallica)
Ozzy Osbourne
Mick Jagger (Rolling Stones)
Steven Tyler (Aerosmith)
Robert Plant (Led Zepplin)
Freddy Mercury (Queen)
George Thorogood
Stevie Ray Vaughn
Eric Burdon (The Animals)
Jim Morrison (The Doors)
Neil Young
Stephen Stills
David Crosby
Art Garfunkel
Paul Simon
Steve Perry (Journey)
Ronnie Van Zandt (Lynard Skynard)
Ronnie James Dio (Rainbow, Black Sabbath)
Roger Daltrey (The Who)
Paul Rodgers (Free, Bad Company)
Bono (U2)
Bob Seger
Bruce Springsteen
Phil Collins
Greg Allman
Peter Gabriel
David Lee Roth
David Gilmour (Pink Floyd)
Ray Davies (The Kinks)
Bon Scott (AC/DC)
Cat Stevens
Brian Johnson (AC/DC)
Bryan Adams
Steve Miller
Roger Waters (Pink Floyd)
Michael McDonald (The Doobie Brothers)
Tom Petty
Peter Wolf (J Geils Band)
Lou Reed
Levon Helm (The Band)

That's about it for now....

Did you want the 'most' popular male singers (as measured by record sales) or just singers that are personal favorites (which is what you seem to be getting). I would also think that you would want efforts by solo artists, as opposed to groups. If you do a little research, you get the following 'best selling' artists. A few surprises, once you distill out the groups. BTW, this list would be more 'rock' oriented, if you included groups:

Bryan Adams
David Bowie
Garth Brooks
Phil Collins
Neil Diamond
Julio Iglesias
Michael Jackson
Billy Joel
Paul McCartney
George Michael
Luciano Pavarotti
Elvis Presley
Lionel Richie
Kenny Rogers
Frank Sinatra
Bruce Springsteen
Rod Stewart
Barry White
Stevie Wonder

One artist not yet mentioned is Ryan Adams. Start with his album titled "29." If you like it, and I'll bet you do, dig deeper into his work. Enjoy.
Thanks so much for the recommendation. I'll check them out and hopefully, get some CDs from Amazon.com soon.

BTW, where do you buy your CD/SACD, LPs? I want to buy them at fair price with guaranteed quality. So far I just bought from Amazon.com.
What about the great Greg Lake ??
Nat King Cole

Ray Charles
Mel Torme
Frank Sinatra
Dean Martin
Ray Charles
Perry Como
Frank Fontaine
Bing Crosby
Tony Bennett
Nat King Cole
Andy Williams
Neil Diamond added to the mix