After that, it’s largely survivorship bias, with every hint of writing about him being preserved, transcribed, recreated, or invented from whole cloth, and anything from his contemporary itinerant preachers being ignored or suppressed.

Not quite. In fact, there’s a rather significant survivorship bias around the versions of Jesus. Literally the very earliest primary documents involve someone known for persecuting Christians telling Christians in an area he has no authority to persecute that they should abandon other versions of Jesus they accepted or other gospels in favor of the version he claimed based on spiritual visions of someone he never met in life.

We have nothing but fragments recorded by its critics of the Gospel of the Egyptians, for example, and the Gospel of Thomas we only have because of a single person burying it in a jar around the time it became punishable by death to possess.

The version of Jesus with female disciples that was talking about Greek atomism and Epicurean proto-evolutionary thought is actually super interesting historically given the overall philosophy, but it’s barely extant and only is because of archeological discoveries after the church lost effectively mega-monarchal status to just become a mega corporation instead.

And even in the modern era discoveries the church has any purview over like the Mar Saba letter abruptly go missing before it can be further validated by scholars.

The survivorship around “other versions” of Jesus look like they were conducted by Stalin with a two millennia reach. It involved literally burning down the successor to the library of Alexandria (and with it sources potentially related to a “Gospel of the Egyptians”).