So basically you're looking for good albums that are older than Led Zeppelin? How about giving these a try then, all from the 50s and early 60s:
Art Blakey & The Jazz Messengers—A Night In Tunisia
A terrific album by one of the most influential hard bop groups. It's also a great starting point if you're a rock fan trying to get into jazz since the album—especially the title track—rocks really f
ucking hard for jazz.
Stuff Smith—Cat on a Hot Fiddle
Sounds like Louis Armstrong playing bebop with a fiddle. Definitely a unique sound and lots of variation from track to track.
Harry Belfonte—Calypso
Despite the title, this is mostly a collection of mento songs. Fun, upbeat stuff that is hands down one of the best albums of the 50s.
Glenn Gould—The Bodberg Variations
Some of the best classical piano playing you'll probably ever hear.
Lennie Tristano—Intuition
Beautiful bebop with a certain classical influence.