Yes, even Bart Ehrman, whom I admire, thinks there was an historical Jesus. However, the spine of his arguments boils down to the two hardy perennials, James the brother of the Lord (Paul) and "everyone who's looked into it thinks so", which is simply an argument from authority.And yet most historians that address the question find the case unconvincing.
Yet the account of Paul is not about an historical Jesus but a gnostic demiurge (like John's) who pre-existed in heaven with God and while there created the material universe, something God, being totally pure spirit would never do.
And the account of Mark, which the other three gospels use, can be explained without the need for an historical figure. Matthew and Luke indeed go to enormous lengths to play the game of "messianic prophecy in the Tanakh". For example, the author of Matthew
─ requires Mary to have been a virgin because the LXX in translating Isaiah 7:14 had rendered Hebrew 'almah, young woman, as parthenos, virgin;
─ invents the unhistoric 'Taxation Census' story to get Jesus to be born in Bethlehem to "fulfill" Micah 5:2
─ invents the unhistoric 'Massacre of the Innocents' story to get Jesus into Egypt to "fulfill" Hosea 11.1.
─ and absurdly sits Jesus across a foal and a donkey to ride into Jerusalem "to fulfill prophecy" (Matthew 21:2-5) in Zechariah 9.9.
─ invents the unhistoric 'Taxation Census' story to get Jesus to be born in Bethlehem to "fulfill" Micah 5:2
─ invents the unhistoric 'Massacre of the Innocents' story to get Jesus into Egypt to "fulfill" Hosea 11.1.
─ and absurdly sits Jesus across a foal and a donkey to ride into Jerusalem "to fulfill prophecy" (Matthew 21:2-5) in Zechariah 9.9.
So I remain on the fence, looking for something decisive to show an authentic historical figure, but not holding my breath. There may have been an historical Jesus, there may not have been. And if there was, we know very little about him.