I think that from the golf architecture at I have seen. The most copied architect has to be Robert Trent Jones Sr. while Dick Wilson did some good work no one was as heavily promoted as RTJ Sr.
His quote of "hard par, easy bogey" continues to define golf architecture to most amateur golfers I run into. The same group that uses this quote also seeks the hard definitions that defined his architecture. Target bunker, hard mow lines defining fairways, water hazards at an angle to create a forced carry and flat greens that slope generally from back to front. His work as the open doctor lead to the shrinking of fairways leading to the death of angles in the general architectural vocabulary. His use of bunkers stranded in the rough lead to the epidemic of these poorly placed hazards.
Honestly, his sons work and Tom Fazio's are interchangeable to me in most cases. They all build golf that does not respect the land or understand how the Genius Loci of a site can be activated to create inspiration. This leads them to attempt to move earth to accomplish the inspiration required for good golf.