Interesting. When you say those right after Paul, do you mean a long long time after, or those that actually knew him such as Clement of Alexandria who carried on where Paul left off?
I have only argued in the past that the books were put in bible format at the Council of Nicea, but were known of long before that and were principally oral.
And what about the Gospel of Thomas, Gospel of Mary, Gospel of Judas, Gospel of John, Gospel of Mark, etc. discovered in The Dead Sea Scrolls?
Why, in your opinion, were these left out, but most probably still taught? Do you think they did not conform to Constantine's agenda at the time?