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If you look for the "Creedal" John Frum you can't find him but if you look for someone who might have inspired the whole movement you can find Manehivi.
Yes, but we're discussing not "to what historical figure(s) does the creedal Jesus refer," but rather whether any of those figures might "count."
It is a perfectly reasonable position, and some posters have endorsed it here, that whoever the historical figures turn out to be, (t)he

"count" or at worst they count with only some very gentle additional assumptions. I disagree with that position; briefly and in part because it is through profession of a formal creed that powerful organizations have shaped world history for many centuries under the banner of a historical Jesus whom they allegedly serve.
Thus, in my criteria for counting, I incorporate biographical subject matter from a document that is woven into the history of the world, just as I incorporate high points of biographical subject matter from literary documents that are woven into world literature. I place special empahasis on fact-like points that can be found in both categories of document. The documents themselves are easily found, read and recited every day almost anywhere on Earth.
I would give a different answer for a "historical John Frum who counts," in part because there is no John Frum character whatsoever who looms as large in world history as the character of Jesus of Nazareth. In other part, and regardless of scale of influence, there is no creedal portrait of John Frum from which to select biographical attributes. You had to place your
"Creed" in quotes. I didn't. That's reason enough to distinguish the usefulness of creeds in the two cases.
On the multipart intervening conversation
This includes some nice examples of that "perfectly reasonable position," which I mentioned above, and with which I disagree with respect to "counting."
Even if he were the unique historical person who fit, I require more for "counting" than fitting the following. "There was a group in Jerusalem known to Paul, with an earlier leader named Jesus, succeeded in Paul's time by leaders named Peter or Cephas and another named James, who was known as the former leader's brother."
If that Jesus wasn't Jewish, or was not killed under Pontius Pilate after a defection of disciple(s), or wasn't a preacher associated with John the Baptist who preached something distinctive about marriage, then I would conclude that the historical Jesus wasn't the Jesus who "counted."
Or, such a referrent would "count" only in the sense of satisfying my curiosity and search for historical persons to whom the revered label "Jesus" might refer. The Jesus who counted in world history would then be a mythical, legendary, or pehaps frankly hallucinated non-historical figure who was "inspired" by a historical Jesus who did
not count.
The answer to the topic question, in that case, would in my opinion be "There is no historical Jesus who counts," except to those who enjoy solving otherwise incosnsequential puzzles. Identifying this Jesus would be, as lawyers like to say, "nice to know," and knowing things really is nice, but the terms of apologetic discourse would seismically shift, to the accommodation of the falsehood of the creeds and scriptures, even on simple matters of biographical fact.