Keith,?
Join lots of other jazz players who use their thumb.? Wes wasn't the only one.?
Look up Jimm Mullin of England:? big man, big guitar, big sound.
Some of the guys I study with (all very advanced pros) use not only their thumb,
but one or two other fingers.? They knock me out with the sound they get when
comping.?
For my money, the mechanical sound of lightning-fast picking with a pick often
lacks a swinging or soulful quality.?
Not so with the thumb.? I use it exclusively.? Getting YOUR SOUND is a function
of your touch and the way you set up your equipment, especially the amp.
Good luck,
RonV
CT/USA