Anything by Miles Davis, but particularly “A Tribute to Jack Johnson”

The Wall - Pink Floyd

Yoshimi Battles The Pink Robots - Flaming Lips

Savior Sorrow - Mushroomhead

Advice From The Happy Hippopotamus- Cloud Cult

Losing the Game - The Blend

The Score - The Fugees

The Mollusk - Ween

And holy shit, I cannot recommend Shpongle highly enough. That album was life changing.

Final edit: Plantasia deserves an honorable mention.