Here is my list of some of the best IN NO PARTICULAR ORDER:

Stairway to Heaven - Led Zeppelin
Bohemian Rhapsody - Queen
Smells Like Teen Spirit - Nirvana
Light My Fire - The Doors
Enter Sandman - Metallica
Walk This Way - Aerosmith
Sympathy for the Devil - Rolling Stones
Back in Black - AC/DC
Won't Get Fooled Again - The Who
Like a Rolling Stone - Bob Dylan
Wish You Were Here - Pink Floyd
Hey Jude - The Beatles
Whole Lotta Love - Led Zeppelin
(I Can't Get No) Satisfaction - Rolling Stones
One - U2
Jump - Van Halen
Good Vibrations - The Beach Boys
Imagine - John Lennon
Layla - Derek and the Dominoes
Purple Haze - Jimi Hendrix
Kashmir - Led Zeppelin
Strawberry Fields Forever - The Beatles
Born To Run - Bruce Springsteen
Livin' on a Prayer - Bon Jovi
When Doves Cry - Prince (if you consider it rock)

those are all I can think of atm...

EDIT: Moar...

Tom Sawyer - Rush
Under The Bridge - Red Hot Chili Peppers
Space Oddity - David Bowie (some people like ziggy stardust better. i say meh.)
Knockin' On Heavens Door - Bob Dylan
You Really Got Me - The Kinks
Under Pressure - David Bowie & Queen
Paranoid - Black Sabbath
Hold Your Hand - The Beatles
Hotel California - The Eagles (why did i not think of this one sooner?)
Sound of Silence - Simon & Garfunkel (or Bridge Over Troubled Water)
Aqualung - Jethro Tull
Sharp Dressed Man - ZZ Top
Free Bird - Lynyrd Skynyrd
Pour Some Sugar On Me - Def Leppard
Sweet Child o' Mine - Guns N' Roses
that one song by Procol Harum I forget the name...
Respect - Aretha Franklin
Johnny B. Goode - Chuck Berry
London Calling - The Clash
Rocket Man - Elton John

eww bon jovi

besides that, why didn't we think of Hotel California? +1

Livin On A Prayer Is an Awesome Song.

Nice Don. I think a lot of The Kinks and The Beatles are classic, but theyre not the same kind of rock