There is a greatest guitarist thread, so I'm making a greatest bassists thread. Muahahaha. My list:

1. Victor Wooten
2. Steve Swallow
3. Jaco Pastorius
4. Louis Johnson
5. Stanley Clarke
6. Jay Bentley
7. Klaus Floride
8. Alaine (from The Devotchkas)
9. Steve Hansgen
10. Billy Sheehan