You may recall the Catholic Church was born out of the first Nicaean Council, where they canonized the four gospels that best reinforced the idea of the supremacy of the Roman state, and burned the hundreds of other so-called “gnostic” gospels, which (judging by the content of the few that survived) far better encapsulate what I would consider “real Christianity”.
I believe you are mistaken. That was next big council. The 27 books were finalized by a man who attended the Nicaean Council. When he got back he wrote a letter stating which books he considered to be canon.