I wouldn't say a wide spectrum of texts - most of the texts that "made it" were being widely used, and few of the texts that didn't were being widely used. Only over a very small number each way was there much serious debate.
Whether one is going to differentiate the apostolic writings from those of later authors isn't a question one has to face at first. It's only in the second century when the original apostles have all be succeeded by second and third generation overseers writing further texts, and as an increasing number of fringe views begin to emerge, that the question arises. That resolving that question is done largely organically and by concensus, with a degree of ambiguity to it, is uncomfortable for those who want precise, clear-cut, certainty - but God seems to consistantly work in that sort of way. Personally I've got a lot more faith in the Holy Spirit working ambiguously through the whole church (including those on the fringe) than in the Holy Spirit working though a somewhat artificial council of bishops handing down an unambiguous answer.