Gene, this might surprise you, but I'd go with Tiger at Pebble as well. Just too damn good.
Miller's round at Oakmont might be the best single round.
Some others no one has mentioned:
Hogan at Oakland Hills
Hogan at Carnoustie (one shot at The Open and he gets it done in style)
Hogan at Merion
Hogan at Oakmont
As much as I never tire of the Venturi story, I think you'd have to go to the Jones quote to disqualify it: There's golf, and there's tournament golf. They're not at all the same.
Does anyone doubt that there are probably tons of stories like the Venturi one, that simply didn't benefit from being told on national TV a few thousand times?