I really like how Billy Gould used to play his Zon in Faith No More. I don't know if his technique was one of kind a virtuoso, but he had excellent ideas and an incridebible mind open way to make his basslines sound. Anyway, if you try listening Living Colour like basscat said, listen to Muzz Skillings too (the guy that played in LC's earlier records).
then, let me think... Rob Trujillo played incredible basslines at Infectious Groove.
If you are looking for something heavier... try listening some of Steve Di Giorgio's projects, like Testamet. He used to play a fretless bass.
At last try to find a record from a band called Cynic. They splited up some time ago. But they were amazing!
Cheers