Tacitus

[Esquilax]

all agree with each other

I am not sure how the evidence could be better than this multiple corroboration and as groups. Do you have any ideas?

Given that multiple corroborations form the basis of every other religion too, it's clear that it isn't the be all and end all of reality. People can agree on wrong things in surprisingly large numbers. What matters is physical evidence that agrees with these claims, and with regards to the resurrection we have no indication that the claim is even possible.