I think maybe I misunderstood you, I thought we were talking about how do we know Jesus' message was preserved, and i think now you meant that you see the same message in the Gospels even without pauls writings.
Yes, that was what I meant.
With regards to your website, do you know what evidences they give for listing authors and dates?
That is only a website I found that conveniently listed the authors. I know there is and has been for a long time debate over the exact dates. I also realize there is some debate about some authorships. If you have a resource you could share that could show me what some of that debate is that you accept as accurate, I would like to understand more about that perspective.
I know who Bruce Metzger is, but I haven't read any of his books. I remember he was an authority on Greek and helped with translation of the RSV bible and a couple of others.