Are you saying that "WMGGW" is not a rock song?? That song has Eric Clapton going apesh*t on the guitar in it. I think it is one of their harder songs. Second, "she came in through the bathroom window" and "mean mr. mustard" are just as hard as most of the stuff the Rolling Stones or The Doors put out during that time. Drums banging, guitars jangling, and bass pumping. Yeah I was really confused by this. I assumed he was listing the songs that people would consider rock, but why the hell are Here Comes the Sun and Ob-La-Di on there. (While neglecting A LOT of others) And as you addressed, it just doesn't seem possible to me to consider While my Guitar Gently Weeps or She Came in Through the Bathroom Window as non-rock. maybe he just went and found the silliest or sappiest sounding song titles and assumed they weren't rock? Paul's fuzz bass that he uses in "Mean Mr. Mustard" is outright sick as hell. I know so many bass players who goof around with that riff. The thing about Zep is that they were all influential as individual performers...not so sure about Jones, but definitely the other 3. The Beatles, as shown by their sub-par (except for lennon) solo careers, worked best as a unit. However, Paul is definitely one of the most influential bass players of all rock history. He is one of the first, if not the first, bass players to play counter melody or counter backbeat. This really was first apparent on their amazing single "Rain". My father once remarked about how he and his buddies were so floored by the bass line in that song that they would turn the bass all the way up and the treble down just to hear that bass line. I think this stems from two things, first McCartney is a melodic genius, no one could deny that. Second, he started out as a guitar player and played lead during most of their days in Hamburg, so it seems natural he'd get bored playing backbeat.