You're looking for instrumental songs, right? In that case:
Try some of Herbie Hancock's repertoire, e.g. Chameleon, Watermelon Man, Cantaloupe Island.
Another one is "Stratus" by Billy Cobham (to me, this song represents the Ultimate Groove). Just skip the 4-minute intro...
Then try "Mercy, Mercy, Mercy" by Cannonball Adderley.
That's some songs to start with.
