Shut Faced Faders
Hmm...
Lee Trevino came to mind immediately
How about Jesper Parnevick? Byron Nelson?
All played with "relatively" shut faced actions. All very very good iron and wedge players.
The entire "square at the top" idea is crazy in my opinion. It's like trying to evaluate the total performance of a car from the size of its hubcaps. There are so many other more important variables to consider.
In my mind, a club is square at the starting position when its leading edge is perpendicular to the tangential line of the desired swing plane. What it looks like at the top however is so variable based on swing plane transitions, grip, clubface rotation, hinge action, etc that defining square at the top is for all purposes really crazy imho.
The definition used by golf channel broadcasters of "laying the blade" on the plane of the swing is bogus, especially if a plane parallel to the shaft plane at address is used. That would mean a clubface rotated 90 degrees clockwise around its shaft axis during the backswing.
Another question... when you view "square at the top" are you always viewing the same "top of the swing"? In other words, from the dtl perspective, is the club both parallel to the ground and perpendicular to the viewing plane?
See how difficult this "top of the swing clubface position" discussion can get?