And for the Gospels we have SEVEN authors, six of whom at least claimed eye witness to Jesus (include James, his own brother)
And we also know of a tradition that had imaginative writings that were then *attributed* to the apostles.
We also know from internal evidence that the gospels were not written independently. That is clear from a reading of the Synoptic gospels. And then, the gospel of John clearly is the result of the expansion of the legend.
And, I should point out, I am not one that questions that there was an itinerant preacher that said many of the things attributed to Jesus in the NT. We even have other examples of the same phenomenon.
And, when we add in the *other* gospels, like that of Thomas, and others that were rejected by the orthodox bishops, we get a very different picture of what happened.
What I am saying is that the miracles are an expansion of the legend, similar to the curing of scrofula by kings.