Guitar stuff in "All along the Watchtower" (Jimi Hendrix's interpretation) idk how to describe what happens in that song. The opening is pretty iconic but there is also a good solo starting @ 1:42https://www.youtube.com/watch?v=TLV4_xaYynY
Guitar solo in "Free Bird" (Lynyrd Skynrd) is a must. These people seem to think it is the 3rd best Guitar solo of all time (http://www.guitarworld.com/100-greatest-guitar-solos-no-3-free-bird-allen-collins-gary-rossington
Not really sure either of those are "Classic Rock/Pop" but people think they are good.
Edited 9/21/2017 23:15:20