Back about 1993, Ed Faron started running a pedigree program called CompUPed, that could do reverse-pedigree searches that would list the total # of champions down from Dog X, Y, Z, etc., spanning (I think) 7 generations. He used to sell this information.
At the time he did so, the dog with the greatest # of Champions down from it (7-generations-deep) was Boudreaux' Eli followed by Indian Bolio. There are, literally, thousands of winners down from these dogs. I know that Redboy is now the big thing, but without Bolio there are no Mayday dogs either, nor any Boyles' dogs (which have oodles of ROMs/Chs, etc.), my dogs, Buck dogs, Hollingsworth dogs, etc.
Who gets the credit for these dogs? Patrick? Carver? Boudreaux?
I would have to say, impact-wise, Tudor, and especially Carver, Boudreaux, Patrick, Chavis, and Tant would be the top-6. Many people could make a powerful argument for Colby and Crenshaw, too.
However, to narrow it down to one breeder would be almost impossible, but if I had to I'd have to say Maurice Carver was the most influential, foundation-dog-creating breeder ever.
Jack