7/10 decent!

TOOL
A Perfect Circle
Pantera
Slayer
Metallica
Lamb of God
Killswitch Engage
Hatebreed
Five Finger Death Punch
Stone Temple Pilots
Rob Zombie

Oh boy. Rock & Roll is a pretty diverse genre, so I'm going to be liberal about what defines it. Here is what I would consider the Pantheon, as in, 10 bands/artists that without them, rock would be a very different thing:

-The Beatles
-Elvis Presley
-Jimi Hendrix
-Bob Dylan
-Johnny Cash
-The Velvet Underground
-The Ramones
-Nirvana
-Black Sabbath
-The Kinks

-The Ramones
-The Clash
-The Who
-The Wallflowers
-The Descendants
-Millencolin
-MxPx
-Rush
-U2
-At The Drive-In

Don't judge my entire musical taste by those guys though.

I'm a hiphop guy, used to be a Nirvana/Zeppelin head back in the day until I turned 16, and I just gave up all that **** because it was a depressing time in my life. Anyways here's my bands in no order:

Nirvana
Led Zep
Guns N Roses
The Beatles
Limp Bizkit
RATM
Modest Mouse
Radiohead
Korn
Pink Floyd

top 10, no order:

Radiohead
Rush
Zeppelin
Pink Floyd
The Beatles
Cream/Derek and the Dominoes/Anything Clapton
Joy Division
Nick Drake
Neutral Milk Hotel
REM

hmm my top ten in no particular order would be
jethro tull
beatles
pink floyd
INXS
split enz
U2
meatloaf
guns and roses
bonjovi

The Smiths
The Libertines
Joy Division
Black Flag
Arctic Monkeys
Sonic Youth
Oasis
Blur
Velvet Underground
The Clash

My top ten...no order
Led
RHCP
Foo Fighters
RATM
ACDC
Queens of the stone age
Pearl Jam
Hendrix
Ramones
STP

10 greatest
1 beatles
2. led zep
3. stones
4. pink floyd
5. u2
6. the who
7. nirvana
8. the ramones
9. bruce springsteen and the e street band
10. blacksabbath

my 10 favorite
1. coldplay
2. radiohead
3. arctic monkeys
4. muse
5. oasis
6. the verve
7. the beatles
8. guster
9. barenaked ladies
10. goo goo dolls

yay!!!!!!!
you ve got 'em all ;]