These are bass players who play in rock 'n' roll bands.
They are oftentimes the unsung heroes, working in tandem with the drummer to establish the foundation and consistency necessary to produce a dynamic recording or live performance.
Here are the 10 best in the business:
1. John Entwistle
Just listen to "Quadrophenia." And then listen again. The Ox was the Who's glue, a superior musician who kept it all together while Keith Moon, Pete Townshend and Roger Daltrey were off in their own happy place.
2. Mel Schacher
Grand Funk Railroad was built on bass. No one has a heavier approach than Schacher. His grooves are demonically dense, gnarly and penetrate bone. Listen to "Closer to Home."
3. Roger Glover
Deep Purple's bass player extraordinaire. Lightning fast and has to be to keep up with Ian Paice and Ritchie Blackmore. One of the masters.
4. Chris Squire
Arguably creates the signature sound of Yes. What makes Squire so unique is the style of music he plays — tricky prog rock with perpetual changes in timing and acute, precise dynamics.
5. Dusty Hill
It's incredible that ZZ Top's sound comes from a three-piece band. Hill's bass playing is a wall of sound, a perfect complement to Billy Gibbons and Frank Beard.
You may never have heard of the Red Hot Chili Peppers were it not for the usually shirt-less Flea. A bundle of kinetic energy, Flea is the fuse of the funk.
7. John Paul Jones
The most underappreciated member of Led Zeppelin, but a key cog in the legendary lineup. He somehow stays right with the innovative John Bonham and handles the often tricky arrangements with precision.
8. Geddy Lee
Has a very different style than Hill, but is a key reason why Rush delivers the power of an orchestra as a three-piece band. Clean, crisp and quick, Lee ranks with the best of them.
9. Billy Wig
Rhythm machine for Boston-based Hell Toupee, a funk-meister from the same genre as Flea. Powerful, trippy and unpredictable, Billy Wig often sounds like he's playing lead.
10. Jason Newsted
Brilliant musician who should get a lot of credit for Metallica's cult and mainstream status. Anchors one of Generation X's best bands. Newsted, with drummer Lars Ulrich, produces tremors.