World number 1 Luke Donald, he's pretty consistent so should have good posture, Rors and Tiger? Two other big names that can't hit the ball that well without a good posture.
"World number 1 Luke Donald, he's pretty consistent", you beat my vote Philly169 , i think he's one of the most consistent swingers, always has the same tempo and rythm. You could probably take some advice from this
There's slight small point that most are overlooking here....There is no point in trying to copy players if the OP's swing isnt on the same plane.....eg. If the OP swings predominantly on the one plane then there is not point whatsoever in he trying to emulate a player that gets his hands high above the shoulderline in the backswing.....The posture for both swing planes will be different.
Likewise if he swings more with a 2 plane swing there is no point trying to copy a swing similar to a one plane.
Different strokes for different folks: Jim Hardy believes Tom Watson to be the game’s ultimate ‘Two Plane’ exponent, his arm-swing notably steeper than his shoulder plane; the multi-talented Peter Jacobson was one of Hardy’s original pupils in the late 1980s and worked on changing from a Two Plane to One Plane swing; Tiger Woods makes a terrific One Plane move with the irons and plays his best golf when he does the same with his woods, says Hardy. Problems arise when he mixes both One and Two Plane elements in his swing with the longer clubs, believes Hardy.
Rickie Fowler is the latest young superstar to display the classic symptoms of the One Plane swing – i.e. the arms swinging around the body in a rotary fashion and the left arm‘matching up’ with the shoulder plane as he completes his backswing
To be fair most top pro's have decent posture, Freddie Couples had and still has a great set up but one player I really like the look of at address is Trevor Immelman.