well, here is my attempt. I feel this is not about what is the "best" music (objective spoken), it's about what do you feel when listening to it or what memories does it bring up. So here goes (some are a bit embarrassing):
Creedence Clearwater Revival - Cosmo's Factory
Van Morrison - Moondance
Emerson, Lake & Palmer - Tarkus
Deep Purple - Made in Japan
Elton John - Goodbye Yellow Brick Road
Triumvirat - Illusions On A Double Dimple
Yes - Tales From Topographic Oceans
Focus - Hamburger Concerto
Queen - Queen 2
Klaus Schulze - Moondawn
Meat Loaf - Bat Out Of Hell
Five more:
Scorpions - Fly to The Rainbow
Golden Earring - Moontan
UFO - Force it
Led Zeppelin - Houses of the Holy
Rick Wakeman - King Arthur
Very cool you mentioned Rick Wakeman