I think I mentioned Rick Wakeman's 1974 album Journey to the Centre of the Earth before but don't remember if I posted a link. He played 11 different synthesizers and keyboards on the album, often 2 at a time. He had 105 solo albums and albums with his son Adam, in addition to the 25 Yes albums he was on, plus 31 more with other bands he was in, and guest appearances on 20 other albums, plus he had a couple of singles.
https://www.youtube.com/watch?v=YJ9W2pZwvlY 25 years later, in 1999, he came out with a sequel called Return to the Centre of the Earth. All of the odd-numbered tracks are narrated by Patrick Stewart. All of the even-numbered tracks are songs. Years ago I listened to the whole CD, then programed my CD player to play the odd-numbered tracks only, and then the even-numbered tracks only. I've only listened to all of it since then. Other musicians include Justin Hayward from The Moody Blues, Katrina Leskanich from Katrina and the Waves, Ozzy Osbourne, and Bonnie Tyler.
https://www.youtube.com/watch?v=p8gF0nW02NA