I recently explored some of his work on ECM. Obviously we all know the Return To Forever album which is a classic in the fusion genre, Crystal Silence with Gary Burton is well known, a great duo piece, and the somewhat lesser known but pretty insane, almost free, ARC album. But I discovered Piano Improvisations Vol. 1, which contains a lot of his most well known themes, last year. This became my new favorite Chick album, even if I'm not always excited about solo piano albums. It's a wonderful listen, a good album to decompress to.
Of course, his fusion bands Return to Forever and Chick Corea Elektric Band put out some of the funkiest music this side of jazz.
I always liked the Elektric Band's album Paint the World, which was another early jazz discovery for me. Sounds more modern than the earlier 80s-tinged albums, but doesn't sound cold and clinical like later releases like To The Stars. I also recently realized that before Frank Gambale joined CCEB, the guitarist on the first self-titled debut was Scott Henderson of Tribal Tech fame, another awesome fusion band. Chick always liked having guitarists with speed metal chops in his fusion bands.
Yesterday I listened to Romantic Warrior and No Mystery, two of my favorite RTF albums. Killer stuff all the way through. The production on RW particularly, has to be some of the best of the era it came out in (mid 70s)