This is an incomplete list (work in progress) of the total amount of entires a certain artist has been in the Guitar Hero and Rock Band Series. It's in order from most to least. Duplicates in DLC and Later Games count as 2, because they had to relicense them, because of recharts, and the GH1 songs rereleased as GH2 DLC had added Bass Tracks. Cross compatible DLC however only counts as 1. RB1 Exported tracks and RB track packs only count as 1, because they are the exact same chart.

Motörhead
-Ace of Spades (GH1)

Ozzy Osbourne
-Bark at the Moon (GH1)

Audioslave
-Cochise (GH1)

Pantera
-Cowboys From Hell (GH1)

Cream
-Crossroads (GH1)

Sum 41
-Fat Lip (GH1)

The Edgar Winter Group
-Frankenstein (GH1)

Blue Öyster Cult
-Godzilla (GH1)

Burning Brides
-Heart Full of Black (GH1)

The Exies
-Hey You (GH1)

Red Hot Chili Peppers
-Higher Ground (GH1)

Joan Jett and the Blackhearts
-I Love Rock and Roll

The Ramones
-I Wanna Be Sedated

Bad Religion
-Infected

Black Sabbath
-Iron Man (GH1)

Queen
-Killer Queen (GH1)

Boston
-More Than A Feeling (GH1)

Queens of the Stone Age
-No One Knows (GH1)

ZZ Top
-Sharp Dressed Man (GH1)

Deep Purple
-Smoke On The Water (GH1)

Incubus
-Stellar (GH1)

Megadeth
-Symphony of Destruction (GH1)

The Donnas
-Take It Off (GH1)

Franz Ferdinand
-Take Me Out (GH1)

Stevie Ray Vaughan
-Texas Flood (GH1)

White Zombie
-Thunder Kiss '65 (GH1)

Helmet
-Unsung (GH1)

Judas Priest
-You Got Another Thing Comin' (GH1)

David Bowie
-Ziggy Stardust (GH1)

Shaimus
-All Of This (GH1)

Anarchy Club
-Behind The Mask (GH1)

Artillery
-The Breaking Wheel (GH1)

The Bags
-Cavemen Rejoyce (GH1)

Graveyard BBQ
-Cheat On The Church (GH1)

Drist
-Decontrol (GH1)

The Upper Crust
-Eureka, I've Found Love (GH1)

The Slip
-Even Rats (GH1)

Made in Mexico
-Farewell Myth (GH1)

Black Label Society
-Fire It Up (GH1)

Din
-Fly On The Wall (GH1)

Freezepop
-Ged Ready 2 Rokk (GH1)

Monkey Steals the Peach
-Guitar Hero (GH1)

Honest Bob and the Factory-to-Dealer Incentives
-Hey (GH1)

Count Zero
-Sail Your Ship By (GH1)

The Model Sons
-Story Of My Love (GH1)

(Unknown Artist)
-Graveyard Shift (GH1 Secret Song)

Andrew Buch
-Trippolette (GH1 Secret Song)

Thin Lizzy
-Bad Reputation (GH2)

Avenged Sevenfold
-Beast And The Harlot (GH2)

Alice Cooper
-Billion Dollar Babies (GH2{360})

The Rolling Stones
-Can't You Hear Me Knockin' (GH2)

The Living End
-Carry Me Home (GH2)

Kansas
-Carry On Wayward Son (GH2)

Warrant
-Cherry Pie (GH2)

Heart
-Crazy On You (GH2)

My Chemical Romance
-Dead! (GH2{360})

Lynyrd Skynyrd
-Free Bird (GH2)

The Sword
-Freya (GH2)