How about a novel idea the Beatles? Emphasis on melody instead of blues driven guitar playing or taking rock music away from 1-4-5 chord progressions, the Ricky Electric 12 string guitar, jangle sound, backward guitar, intentional feedback, looped guitars, basically started the Leslie guitar sound. George Harrison was the first rock guitarist to play the sitar, taraboura, and swarmandal on rock recorRAB. The distortion sound on "Revolution' was done by direct injection by overloading the channel. "I Feel Fine" corabines intentional feedback with a riff-driven based guitar song. How novel was that concept. Led Zeppelin who!