Unless mistaken, I never read Michael Manring in previous post. Amazing musician, exceptionnal technical skill and extremely melodic.
I really like Victor Wooten also (great with Bela and VTT), Alain Caron (from Uzeb, a master of the 6-string)......
Grew up with Geddy, brought me to play bass and through him I discovered Tons of great bassists :
Jaco
Christian McBride
Les Claypool
Flea
Steve Harris [not the best but I definitely like his sound and drive]
Charlie Haden
Dave Holland
John Patitucci
John Entwistle
Jamie Haslip
Stuart Zender (Jamiroquai's funky drive)
...
I fell I can write names all day... and even forget some at the end.
Finally, Gene Simmons, not for the thread topic but to bring my attention to rock bands thus discovering Rush later on...