Claypool and Flea hands down. I was a drummer until I heard them.
In chronological order.
Chris Squire
Paul McCartney
Geddy Lee
Stanley Clark
Jaco Pastorius
Eddie Gomez
John Patitucci
Will Lee
James Jamerson
If you're old enough to go back to the early 60's, you were inspired to be a musician by the Beatles. if your record player could reproduce bass faithfully, you wanted to play like Paul McCartney. Even the simpler bass lines were rendered with that bouncy mojo. If you're over 65 and saw The Ed Sullivan Show in 1964, how could you not have not wanted to play the walking bass line in All My Loving?