Stan Musial was one of the greatest hitters of all time, playing for the Cardinals for 22 years from 1941 to 1963. He could hit for both power and average, accumulating a lifetime .331 batting average, a lifetime .976 OPS, and a lifetime OPS+ of 159.
Elsewhere, I go into more details about The Secret of Stan Musial's Swing, but here are some of the better, clearer clips that I have been able to find.
Stan Musial didn't have a textbook swing. He lunged more than is typical on many pitches, presumably off-speed ones. However, he did what every good does; he kept his hands back.