Oakmont is a good answer. Garden City another.
Royal Worlington & Newmarket would have been passed over by many architects as impossible -- not enough land for even nine holes, if you aren't as clever as its architects were. If you had just driven by the land without a golf course on it (and there is a road right alongside), you would certainly not have been drooling over it. But that just goes to show you that "indifferent" is based on the observer.
I don't think places like The Rawls Course or Shadow Creek or Bayonne should count -- in theory, everybody could build the same thing in their backyard, if they had the money. Likewise, a difficult but gorgeous site like The Sanctuary or Stone Eagle is probably a different category.