From the brilliant and long-lost Texas (or was it Nashville) tv show "The !!! Beat," here is Miss Barbara Lynn, my vote for the coolest lady in R&B. She's playing a lefty, Telecaster, for Pete's sake.
Six volumes of "The !!! Beat," all 26 episodes of the 1966 show in outstanding quality, can be found HERE. Every once in a while, a premium priced DVD set comes along that is worth every penny of its list price. These is those.