How do you determine who is the best? What are YOUR criteria? My criteria for great breeder may not be the same as the next person posting.
There are tons of great breeders out there, some well known and some who are small hobbyists who can provide equally amazing animal and equal customer service.
I could list several breeders some with whom I have done business some with whom, I would not hesitate to do business, and in my book one is not better than the other.