What are some good rock songs primarily acoustic guitar that would be worth mentioning?
Hey hey what can i do and american pie are some exemplary acoustic songs that have stood the tests of time.

uh some pretty good acoustic rock songs i know of would be:
wish you were here - pink floyd
american pie - don mclean
going to california - led zep
definitely plenty more ...

Good Ridence (Time of Your Life)-Green Day

Bron-Y-Aur Stomp- Led Zeppelin

: The Wind - Cat Stevens.
: Tears In Heaven - Eric Clapton.
: Black Country Woman - Led Zeppelin.
: The Needle And The Damage Done - Neil Young.
: You've Got to Hide Your Love Away // Blackbird - The Beatles.
: Black Water - The Doobie Brothers.
: All I Really Want To Do - Bob Dylan.
: Little Martha - The Allman Brothers Band.
: Starman - David Bowie.
: From The Beginning - Emerson, Lake and Palmer.
: True Love Waits - Radiohead.
: Sleep Dirt - Frank Zappa.
: Mother - Pink Floyd.


<Added>

I can not believe I forgot: Norwegian Wood (This Bird Has Flown) - The Beatles.