Billy Gould - Faith No More
Larry Graham - Sly & Family Stone, Solo
Geezer Butler - Black Sabbath
Verdine White - Earth Wind & Fire
A good way to cop some ace basslines is just to get the generic Disco/Motown/Funk boxsets that go cheap in HMV etc.
You can get the 3 CD sets for around a fiver, loads of top tunes on them. I bought a few a while ago and there's Chaka Kahn, Curtis Mayfield, James Brown, Rick James..... you get the picture!
Plus introduces you to stuff you wouldn't have heard otherwise