I probably forgot some, but what the heck....
Aerosmith
After Forever
Alice in Chains
Andy Timmons
Antimeridiem
Arch Enemy
Ayreon
B
Black Diamond Brigade (They've only made one song, but what the heck.)
Black Label Society
Black Sabbath
Born to Shred
Brainstorm
Bruce Dickinson
C
Chris Isaak
Clutch
Cream
D
Dave Matthews Band
Dead Soul Tribe
Deep Purple
Derek Sherinian
Dimmu Borgir
Django Reinhardt
Dream Theater
E
Emperor
Eric Clapton
Eric Johnson
F
Frank Zappa
Freak Kitchen
G
Gordian Knot
Green Day
I
Iced Earth
Immortal
In Flames
Iron Maiden
J
Jimi Hendrix
Joe Satriani
K
Kaizers Orchestra
L
Lacuna Coil
Led Zeppelin
Luca Brasi
Lynyrd Skynyrd
M
Marcel Coenen
Marillion
Mattias 'IA' Eklundh
Megadeth
Metallica
Monster Magnet
Muddy Waters
N
Nevermore
Nightwish
Nirvana
O
Opeth
Ozzy Osbourne
P
Pain of Salvation
Paul Gilbert
Pink Floyd
Planet X
Porcipine Tree
Psycho Motel
Q
Queensr�che
Queens of The Stone Age
R
Rage Against The Machine
Rush
S
Seigmen
Sepultura
Slumber
Spock's Beard
Staind
Steppenwolf
Steve Vai
Stevie Ray Vaughan
Sun Caged
Symbiosis
Symphony X
T
The Offspring
The Ramones
Threshold
Thunderbolt (not the polish black metal band... the norwegian heavy metal band)
Tilutus
TNT