Bob Munden. Fastest draw, probably ever. Un-freaking-believable fast.
RIP.
That's for sure. I remember watching some footage of him, and thinking "Boy, those are pretty amazing doubles" (with a Colt Single Action Army, I believe).
I was wrong. They were triples: one shot with a pull of the trigger, followed almost instantaneously by two "wrist shots", one with the thumb, and then the trailing pinkie finger, I believe.
Slow motion was required to see it, of course...
I had an instructor by the name of Larry Hanby. He had a business in the Bay Area and even appeared on Mythbusters because of his fast draw and accuracy in shooting a small coin from the draw.