Do you think that there might have been two Jesuses who lived roughly at the same time in Israel - One who was a prophet and one who was crucified for a crime and then rose from the dead? Both were remembered and the two stories merged when all the witnesses were dead. Is that plausible with the historical data?
I think that if two people are significant enough to be remembered for decades after their death, they're significant enough not to be confused like that, at least not by their own followers.
I can't imagine any reason why the scenario you suggest would be more likely than the much more plausible one that there was only one (relevant) Jesus. If you're going to accept that there existed a Jesus who was crucified and rose from the dead I don't see why it would be such a great stretch of the imagination to suppose that he was also a prophet.
That seems to be what I've noticed too. The ESV is very popular among the various evangelicals I know. What do you think of the ESV as a translation?
I really don't know it at all, but if it's based on the RSV then I imagine it to be decent, since the RSV (or its derivations) is the most standard scholarly translation.