Funky/fusion jazz with heavy base emphasis....

Grade Boy All Stars are prettty groovy, but do have some horns.

Billy Cobham: Spectrum, has some funky tunes

Zao: Shekina, actually a prog lp but some of the funkier tunes blow me away, beautiful record

To continue thought of Benthar on Bill Laswell works I'd add

Material "Halucination Engine" and
"Mastermind"

Ambitious Lovers "Greed" with avant-funco guitarist Arto Lindsay.

Oops! Sorry, there is no Grade Boy All Stars...they are called Greyboy Allstars. I only knew them from a radio program and it sounded like the announcer was saying "Grade Boy All Stars"! Went to a record store and DISCovered the truth

BTW, I think Maraketz recomendation of Material "Hallucination Engine" is good one, it's more bass heavy & groovy than Praxis (also Bill Laswell produced). Get Material and forget about Praxis, I dont think it's what you are looking for (based on your description).

Also...Beastie Boys import only jazz instrumentals.."in sounds from the way out"...pricy and hard to find...but well worth the effort...if you like funky,groove jams...

The following are in addition to the great funky bass playa's mentioned above.

Marcus Miller - The Sun Don't Lie &/ M2
Jimmy Haslip - Red Heat
Braxton Bros. - Steppin' Out &/ Now & Forever
Abraham Laboriel - Dear Friends &/ Guidum
Michael Manson - The Bottom Line
Chuck Smith - Bassically Bass
Zachary Breaux - Uptown Groove
Max Bennett - Great Expectations &/ Private Reserve &/ People & Places