I would say Rolex for sure. However, I think Rigid deserves a mention here. He does not have the large quantity of sons that Rolex has but he has produced some large offspring such as the world record, Big Rig. He has some others too that are not as widely known.
More importantly, when you see him in person, or at least when I do, I think he is the perfect example of a large framed whitetail with lots of antler that is still aesthetically pleasing.