Jesus was certainly not the Messiah as based on any Old Testament meaning of the term beyond possibly being an anointed one like many others.
Let me try to address each of your points briefly at least.
First, I see three separate phases of Jesus, before birth, during his life here on earth and after his ascension.
Incarnation:
Incarnation means fully taking on the characteristics, becoming the thing itself. Jesus as born of Mary was just man, not God/Man, and I think that if there was a sacrifice, that is the real one, GOD becoming just man, not being able to control his bowels, having to learn to walk and talk, learn how to go potty, learning how to stand on one foot and blow spit bubbles and how to hop or skip, learning how to get along with other people, to express himself, communicate, earn respect.
Prophet:
Certainly he was a prophet, as is anyone that carries a message from GOD.
Son of God:
Many were called both "Son of God" and "Son of Man". Generally both meant "one that was beloved by God and given limited authority".
Messiah:
Christianity totally revised the meaning of the term Messiah as it changed the referent from an immediate change in the political structure and power structure to an afterlife.
My belief is, and it is just a belief, that Jesus before his birth and after his resurrection is divine. While he was alive and among us he was simply human.
Anyone so limited that they can only spell a word one way is severely handicapped!