Second the Victor Wooten recommendation (have most of his output incl the Flecktones stuff) also Steve Bailey is worth a punt (6 string fretless!) if you want more 'exploratory' music!! (youtube him to see)
As a bass player myself I'm interested in what you are listening for/enjoying hearing; is it the interplay between musicians? the overall vibe of the song? the musicianship/dexterity of (just) the bass player? Sometimes the band needs to step up a few gears to get people 'mobile'
and that's always good to capture; I think MM himself carries that idealism into the studio (and he's been in there a LOT, took me a few years to realise 'twas himself was on Michael Franks' "Read My Lips")
Another personal fave of mine is Norman Watt-Roy, if you want to hear a universally-respected bass player check him out on most Ian Dury/Blockheads output.
Steve