Although it is often debated whether King Crimson is the ground zero for Progressive Rock’s birth, there can be no argument that they are definitely one of the genre’s forefathers. Granted, this is a band that even in their heyday received little airplay and even today are hard pressed to be found on Classic Rock stations around the dial, but commercial success was never what defined them. Guitarist Robert Fripp (The only constant member in King Crimson’s ever changing lineup) stated that “King Crimson is a way of doing things”. A great quote, as the band was (and still is) about experimenting and pushing the limits of whatever musical style they decide to tackle. Like others on this list the genre of Progressive Rock must be first acknowledged by the Hall before they get a decent shot.