He doesn't fit as an Archetype for good behavior though.... not unless you subscribe to all of his teachings which Include the belief in God and Jesus' divinity. Without those he quickly becomes a lunatic or fanatic.
Of course, and in those cases, it is projected nowhere... the archetype doesn't need to be a real person. It's just that; an ideation. It exists within all of us as part of an ideal that may or may not exist.
For Christians, it definitely exists, and that archetype is called Jesus. This was followed through for many, many years by the majority of Western civilization until irreligious philosophy took over religious philosophy as people's primary means of orienting to life. However, He continues to exist, because Bible continues to exist and while Christianity is mostly outdated as philosophy (no offense meant), there are people who still believe it.
I'm not sure if I'm translating this correctly, but perhaps the best example I can give is to look at the Muslim world. Muhammad is unanimously considered the Good Behavior archetype. Whether or not he was real is inconsequential, when people are troubled, they think "What would Muhammad do?" In fact, they are not thinking what Muhammad in such a situation would do, but would their inner Good Behavior Archetype is telling them to do, which is then projected outward.
I cannot say that for myself, because my primary philosophy in life is an irreligious one, but there is definitely a tiny man inside my heart who guides my behavior and tells me right from wrong. Overtime, I might find that man in the real world, or I might never; only time is testament for that. Overtime, the Muslim world might be overtaken by irreligious philosophy and Muhammad, like Jesus, would continue to exist regardless of being outdated, because Qur'an would continue to exist... but it doesn't invalidate the reasons why these religions were created in the first place; to provide means to orient oneself to life.
...am I making sense?