In Billy Casper's book titled "The Big Three and Me," Casper talks about his time on Tour and how when a new golfer came onto the scene it was extremely rare that they had a great swing combined with ability to handle pressure. He mentions that sometimes on the range they would see someone with the most beautiful of swings and how he would think to himself "surrender now." Usually, though, it would come to pass that under pressure that golfer would struggle and that beautiful swing paired with a shaky putting stroke.
Certainly you must admit that the PGA Tour is full of great swings whose trophy case does not match up with their beautiful swings. The players who have both are extremely rare - maybe once-a-generation type players we are talking about here. For my generation I have been lucky enough to get to watch one of these greats, and his name is Tiger Woods.