I thought the architect combinations of the two premier US courses was interesting. It implies that collaboration can work, and produce a better outcome. Or, perhaps it is just the land that begat the course.
Pine Valley - I wish I could list all of the architects involved but I can't.
Cypress Point. We talk about Mackenzie, but then there is Robert Hunter's significant involvement, as well as Seth Raynor's initial contribution, then Marion Hollins fine-tuning.
Perhaps similar collaborations happen today (I'm not talking about Sebonack here) but they happen within the architectural firm, through discussions between the principals, the design associates and the shapers. The interplay of ideas occurs without the public names.
James B