Ok, you got me on that one. Find one Church Father, East or West, that would affirm Protestant doctrine over classical Catholic or Eastern Orthodox traditionm, ie, on the True Presence of Jesus in the Eucharist, the Priesthood, the perpetual virginity of Mary(which far predates the fourth century), apostolic succession, the Primacy of Peter, forgiveness of sins through the ministry of the Church, etc.
The early Fathers weren't Protestants; they were Catholic.
They were Christian. I'll provide answers to you this evening -- my lunch is over.