Jimmy loved Kalidescope, (the American one as opposed to the British one) They were his favorite group in the late '60's. He even singled out their album Beacon from Mars. I read he wanted to model Zep on them. He also said Leige and Leaf by Fairport Convention was the best album of 1969 in his '72 interview from ZigZag. Both of these albums I got and love on his recommendation. He loved Spirit and Little Feat, too, I know. He loved Bert Janech too who wrote the orginal way Black Mountain Slide is done. The others I'm not as certain, but I know Robert also like Kalidescope and of course Fairport Convention, and blues like above. They both loved Elvis, especially Robert while Jimmy loved his guitarist (James Burton?). Jonsey and Bonzo, I'm not sure about.