I was just thinking about this and was surprised that nobody posted anything like this. I guess just do what the title says, and post your top 10 bands/artists. They don't have to be from any particular genre, decade, or whatever. Just your top 10.
I had a really tough time narrowing it down to 10, and this will probably be revised soon. Anyways, here it is.

My Top 10:

1. The Beatles
2. Led Zeppelin
3. The Who
4. Queen
5. The Rolling Stones
6. Pink Floyd
7. Jimi Hendrix
8. The Eagles
9. Rush
10. Aerosmith

*Honorable Mention*
Nirvana, Foo Fighters, Pearl Jam, U2, Michael Jackson, AC/DC, The Doors, Lynyrd Skynyrd, ZZ Top, Metallica, Judas Priest, Black Sabbath, Bruce Springsteen, The Clash, and many more.

loltypicaldadrockcharts

Anyway:

The Beach Boys
Pixies
The Flaming Lips
The Jesus Lizard
Yo La Tengo
Death Cab for Cutie
Modest Mouse
Luna
764-HERO
White Guys Jumping

Scar Symmetry
Soilwork
Sevendust
Fates Warning
Queensryche
Mudvayne
Dream Theater
Alice In Chains
Pantera
Disturbed

Honorable Mentions:
Trivium
Creed
Papa Roach
Godsmack
Iced Earth
Disarmonia Mundi
Guns N' Roses
Korn
All That Remains
Redemption
Spineshank
Alter Bridge
Machine Head
Ill Nino
Unloco
Drowning Pool

EDIT: I also forgot the obvious Metallica and Megadeth :D

OP: I will take your top 10... Maybe move the order around a bit, but it is a solid list to me. Nicely picked.

Honorable mentions I would select that you didn't already include: Yes, Bowie, Rod Stewart, Supertramp, Santana, Journey, Styx, The Police, Van Halen...

I was going to work on a top 20 for something and add reasonings to them, but here's my tentative list(yep, the whole 20):

20: Tie between Smashing Pumpkins and Alice in Chains to be decided upon on a later time. You only want 10 anyway so this is how it's staying.
19: Sonic Youth
18: W.A.S.P.
17: The Doors
16: Agalloch
15: Joy Division (not sure if they'll stay though, considering their relatively brisk discography)
14: Van Halen
13: The Who
12: Bruce Dickinson (solo)
11: The Beatles
10: Pink Floyd
9: The Velvet Underground
8: Frank Zappa
7: UFO
6: Thin Lizzy
5: Megadeth
4: Death
3: Black Sabbath
2: Led Zeppelin
1: Iron Maiden

No order and subject to change

Frank Zappa
Fates Warning
The Flower Kings
The Mars Volta
Anthrax
High On Fire
Helloween
Magma
Pain Of Salvation
The Tangent

Pick 10.

1) Beatles
2) James Brown
3) Rolling Stones
4) Jimi Hendrix/Experience/Band of Gypsies
5) Parliament-Funkadelic
6) Chuck Berry
7) Billy Joel
8) Queen
9) Elton John
10) Meat Loaf

Order moves around every now and then.

http://www.youtube.com/watch?v=VxYcIb-rF9s

I would post mine, but I would be flamed more than you have ever seen before.