How is your experiment in this health and temperament correction progressing? Have you had any progress?
I think you could start with the Great Dane, the English Bulldog, and the Labrador Retriever. The Great Dane has significant health and structural problems across the breed so any improvement would be welcomed. The English Bulldog is basically useless now so starting with the Levitt Bulldog OEB would point you in the right direction. About the Labs, that is a crapshoot. Some are still great working dogs but most are now useless as far as their function. Please let us know how you progress.