At the risk of seeming really pretentious, here's a list of some of my favorite prog rock songs that I think are accessible to anyone. Give the full 40 minutes or so of each song a chance!
  1. "Close to the Edge" by Yes
    I get chills every time the dissonant, insane introduction breaks into that amazing riff. This is pretty much a perfect song. The album art is cool too.
  2. "Supper's Ready" by Genenis
    Genesis went downhill after Peter Gabriel left, in my opinion. Sure this song is obnoxiously long and has non-sensical lyrics, but I promise it's all worth it. At least get to the dad diddly office part.
  3. "Thick as a Brick" by Jethro Tull
    Okay, this song is even obnoxiously longer. Clocking in at a little over 40 minutes, this two-parter will take the same amount of time to listen to as it takes to watch a Breaking Bad episode. In all fairness though, it's basically the Scream of prog rock - total loving satire. If it were any shorter it wouldn't get the point across.
  4. "The Last Battle" by Rick Wakeman
    After leaving the band Yes, insanely skilled keyboardist Rick Wakeman had a successful solo career of his own. This song is the finale of his King Arthur album and can only be described as epic. Gone are the days of the Knights indeed. Can you tell I like melodramatic music?
  5. "Pictures at an Exhibition" by Emerson, Lake, & Palmer
    Sure they didn't write the source material, but they definitely made it their own. No one combines classical and rock music nearly as well as ELP. I'll use this opportunity to bring up their version of "Nutrocker" as an honorable mention. I still can't decide if I like Wakeman or Emerson more at the keyboard.