Pop/Rock- Billy Sheehan is technically the best. In a group John Entwistle was the best. He was a great antithesis for Keith Moon's erratic brilliance.
Acoustic/Jazz- Scott Lafaro and Eddie Gomez, maybe it's my bias to the Bill Evans Trio.
Acoustic/Jazz- Scott Lafaro and Eddie Gomez, maybe it's my bias to the Bill Evans Trio.