Does anybody know of bass guitarists who play only or mainly with their thumbs? I don't mean funk slapping. Just plucking with the thumb. I ask because I think you get the fattest, beefiest tone that way, compared to the other fingers or obviously a pick. I usually play with a pick but I did a whole gig last night mainly with the thumb and a bit with the fingers and everybody commented how much it sounded like an upright.