Toss up.... Geddy Lee & John Paul Jones. Both work magic complimenting their drummers.
JOHN PAUL JONES
Add Jack Casady to the list as he played some awesome bass with Jefferson Airplane, Hot Tuna
My ALL-TIME favorite bass player is John Paul Jones. He IS the reason why I play bass! I have his(zeppelin)symbol tattooed on my wrist in flames. Next in line would be Chris Squire, then Barry Oakley. Honorable mention would be Cliff Burton-Tim Commerford-Eric Wilson.
Nice to see Barry Oakley get a nod. The guy was a genius on bass and the absolute perfect complement to Duane Allman.
In addition to the greats already mentioned I would add:
And you oughta take a look at Carol Kaye. As they say... don't judge a book by her cover.
Carol Kaye played on more hits than The Beatles.
And then you have Stuart Hamm....