BEST PLAYERS
First of all, John Bonham was the best rock and roll drummer ever to walk the face of this planet, and that's an informed opinion coming from a former professional drummer. John played drums unlike anyone else ever did, still does, or ever will, and that fact is continually demonstrated in the astounding breadth and depth of his recorded work. He had complete independence in all four limbs, he slammed his drums harder than anyone else, and he did it with speed and total precision, never once dropping the beat. His beats were innovative and creative, and John was never stuck in simple grooves. His fills were innovative, creative, complex, and technically brilliant, he knew when to keep it relatively simple (i.e. Kashmir), but he was always in the stratosphere of drumming. And to top that all off, John created a giant drum sound which is unique. It inspired a host of imitators who were able to imitate the sound of his snare drum, but only with a simple backbeat. At the time that Led Zep was formed, Jimmy Page could have gotten any drummer in the world to play with him, and he chose John. There's not one single drummer alive or dead who can begin to touch John's power, creativity, speed, precision, and technical brilliance. I've heard that Jimmy still feels the same way about John as I do.
Secondly, Jimmy Page has always been one of the best rock guitarists ever, right from his earliest days as a session player and the beginning of his real public stardom in the Yardbirds. I believe that Jimmy is the most brilliantly prolific of all the great rock and roll guitarists. I suspect that Jimmy would agree with me that Jimi Hendrix was the one true genius of guitar because he came from another galaxy in terms of his sound and his use of feedback. But unfortunately, Jimi died and we will never know how much further he would have progressed. When I listen to Jimmy's solos using the violin bow, I get the urge to put him on the same pedestal as Hendrix and wonder which galaxy they both came from. As a songwriter, Jimmy used his superior ability to play lead guitar to create actual song structure. Led Zep's songs use not one or two of Jimmy's incredibly powerful, complicated and unbelievably SEXY riffs in each song, but there are four, five or more riffs in some songs. Jimmy's riffs differ from each other within each song, and also from song to song. His lead guitar playing can be HARD and sexy, he can be sensitive and beautiful, and he can be technically brilliant, all in the very same song.
Thirdly, John Paul Jones is a bass player who attained a level of brilliance comparable to Paul McCartney. Just like McCartney, John could play beautiful "melodic" bass (i.e. "Ramble On"), he could play as fast as it gets, but he also knew when to keep it simple and just hold down the bottom although I think he was incapable of doing that without utter sophistication. No one at all can touch those two on bass, and John also played consistently brilliant keyboards - piano, organ and synthesizer. The intricate way in which he wove his bass guitar playing into, through, and underneath Jimmy's guitar playing is nothing short of perfection itself.