Jesus. Jesus was the first son of god and did many things to spread his farther's word one example was creating a church for the people. which is a place of holiness where you are allowed to worship anyone is invited
Actually, I think that the founder of the Christian church is the father of all nations: Abraham unless, we are talking further in the future of when the actual Christian church was founded then I would say that the title of the founder of the Christian Church would have to be one of the Disciples of Jesus like Peter, or maybe the Apostle Paul? I hope this helps