Guess I'm having trouble understanding what is meant by the "epic" nature of the song. Do you mean like Close To The Edge or Thick As A Brick or even, It Never Rains?
Major artists that don't have an epic song
A song that.could start slow and build to an over the top finish or middle. There will be some arguments on this post. One artist that comes to mind is Bad Company. Fleetwood Mac. The Rolling Stones. The Yardbirds. Ok scratch that one because songs in that era were mainly short. Journey.