We could go down the rabbit hole of what actually qualifies as "evidence" at this point but there's little point. Evidence is, essentially, the availability of facts or information that indicate whether a belief is valid. If there were sufficient facts and/or information to validate the existence of God then, by default, the concept of "faith" would surely no longer exist. You can't have faith in the existence of something if, as you say, "any rational person would find the evidence for the existence of God overwhelming". Faith, surely, is the belief in something despite there being no real proof, evidence, or rational reasoning behind the belief.