Is it just possible that TOS could be about the only time Wyatt was portrayed at least remotely more like the real person?
It may have gone a bit against the then-prevailing trend, but it wouldn't have been the first time the Earps were portrayed less-than-favorably. Portrayed more like the real person? No, that wouldn't be a terribly accurate statement, either. Wyatt Earp was neither the hero of one telling nor the sinister bad guy of "Spectre"; he was in a lot of ways a pretty ordinary human being, and only a temporary deputy marshal at the time of the historical shootout which occurred six doors down from the back entrance to the OK Corral.