The Bible was not edited by anyone.
If you are talking about what books were included, that process was a lot more straightforward than you have been led to believe.
Paul's letters were already considered scripture in the mid 1st century:
2 Peter 3:14-16
14So then, dear friends, since you are looking forward to this, make every effort to be found spotless, blameless and at peace with him. 15Bear in mind that our Lord's patience means salvation, just as our dear brother Paul also wrote you with the wisdom that God gave him. 16He writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction.
Irenaeus, writing about 170, tells us that the 4 fold gospel was already a rock solid fact by then:
But it is not possible that the Gospels can be either more or fewer in number than they are. For since there are four zones of the world in which we live, and four principal winds, while the church has been scattered throughout the world, and since the "pillar and ground" of the church is the Gospel and the spirit of life, it is fitting that she should have four pillars, breathing incorruption on every side, and vivifying human afresh. From this fact, it is evident that the Logos, the fashioner [demiourgos] of all, he that sits on the cherubim and holds all things together, when he was manifested to humanity, gave us the gospel under four forms but bound together by one spirit. (Against Heresies 3.11.8)
The 4 gospels and Paul's letters......that is the bulk of the New Testament right there.
In addition, the fact of the four-fold gospel is also stated in the "Muratorian Fragment" which was written about the same time (around 170 A.D.) that Irenaeus was writing. The Muratorian Fragment lists for us basically the whole New Testament canon and it shows us once again that the four-fold gospel was an established fact by then.
We have approximately 50 manuscripts of the New Testament that PRE-DATE the Roman takeover of the established church in the 4th century, and we have piles and piles of New Testament quotations from the early church writers of the 2nd and 3rd centuries. We can be QUITE certain that the New Testament we have today has come down to us just as it was from the earliest days.
Yes, the Romans came in to the church in the 4th century and corrupted it and paganized the institutional church. There were many Christians who resisted this, and they were persecuted brutally. However, Christianity and the Bible were doing JUST FINE before Rome ever came on the scene.