Hi Billy... for some reason I was thinking about my list of favorites and really wanted to add an extensive list of favorites and the type of music they do - hope this may spur some new favorites for you and others.
Here it is- I did not include descriptions for all - as I felt some weren't needed:
Jon Anderson (lead singer of Yes - progressive rock)
Badly Drawn Boy (modern rock)
Chris Bangs Project (progressive jazz)
The Bears (progressive rock - w/ Adrian Belew)
The Beatles
Adrian Belew (progressive rock)
Pat Benatar
B-52's (80's new wave)
Blackfield (modern progressive rock)
Blondie
Blue Man Group (electronic beats)
David Bowie
Sarah Brightman (classic vocalist)
Kate Bush (new wave - alternative rock)
Karen Carpenter
Carpenters
The Cars (alternative rock)
Cat Power (Chan Marshall) (modern progressive folk)
Coldplay
Cousteau (ballads, vocals, modern rock)
Depeche Mode
Neil Diamond
Dido (beautiful vocals)
Eagles
Earth Wind And Fire (R&B, Funk)
Edison Glass (modern Christian rock)
The Editors (British modern rock)
Electric Light Orchestra (classic rock)
Brian Eno (ambient, alternative rock)
Donavon Frankenreiter (current day modern pop, R&B)
Michael Franks (smooth jazz)
Peter Gabriel (modern rock, alternative rock)
Cystal Gayle (country, pop)
David Gilmour (lead singer of Pink Floyd, progressive rock, alternative rock, modern adult contemporary)
Justin Hayward (lead singer of Moody Blues, progressive rock, alternative rock, modern adult contemporary)
Heatwave (R&B, disco, funk, jazz)
Jimi Hendrix (heavy guitar rock)
Joe Jackson (classic rock, blues, new wave, classical, jazz, swing, be-bop, salsa, etc.)
Elton John
Norah Jones (jazz-pop vocals)
King Crimson (progressive rock, alternative rock w/ Adrian Belew)
Kinks
Klaatu (progressive rock, alternative rock, pop - writers of "Calling Occupants...")
Klark Kent (quirky new wave - Stewart Copeland of The Police)
Kraftwerk (electronic disco, new wave)
Diana Krall (smooth jazz, light pop)
The Lads (Christian rock)
k.d. lang (country, pop, cowpunk)
Cyndi Lauper (new wave, pop)
Led Zeppelin (classic rock)
The Listening (Rock and Roll Worship Circus)(Christian rock)
Lene Lovich (new wave)
Madness (ska, new wave, pop)
Barbara Mandrell (country, pop)
Manhattan Transfer (jazz, be-bop, vocals, pop, disco)
Massivivid (Christian alternative electronic rock)
Dave Matthews (classic modern rock)
John Mayer (modern adult contemporary)
Medeski Martin & Wood (progressive jazz)
Moody Blues (progressive rock, alternative rock, modern adult contemporary)
Anthony More (late 70's early 80's British rock, alternative rock)
Juice Newton (country, pop - writer of "Sweet Sweet Smile")
Gary Numan (electronic alternative dance rock)
Lee Oskar (jazz, funk, R&B)
Dolly Parton (country, pop)
Tom Petty (classic rock, southern rock)
Pink Floyd (progressive rock, alternative rock)
The Police (alternative rock, reggae-rock)
Poor Old Lu (Christian alternative rock)
Projekct Two (ambient jazz space rock)
Queen (classic rock)
Return To Forever (progressive jazz)
Roxy Music (alternative rock, new wave, modern adult contemporary)
Sade (smooth jazz, R&B)
Silversun Pickups (modern rock)
Paul Simon (pop, classic rock)
Ricky Skaggs (bluegrass, Christian country bluegrass gospel)
Snow Patrol (modern rock)
The Specials (ska, new wave)
Steely Dan (classic rock, jazz)
Stellar Kart (Christian modern rock)
Sufjan Stevens (indescribable - classical rock?)
Styx (progressive rock, classic rock)
Donna Summer (disco, rock, pop)
Supertramp (classic rock, progressive rock)
t.a.T.U (Russian alternative rock, pop)
James Taylor (classic pop)
Telex (electronic disco, new wave)
Randy Travis (country, bluegrass, Christian bluegrass)
Tree63 (Christian alternative rock - from South Africa)
U2
Julieta Venegas (Mexican pop, R&B, mariachi, salsa)
War (R&B, funk, jazz)
Jennifer Warnes (pop, country, easy rock)
We Are Scientists (scientific rock, alternative rock, modern rock)
Weather Report (progressive jazz)
Lenny White (progressive jazz)
Steve Winwood (classic rock, pop)
Stevie Wonder (R&B, funk, pop, rock)
Yes (progressive rock, alternative rock, modern adult contemporary)