Jesus is Our God that became man. There are no others because Jesus was God and there are no others.
Jesus is exactly the person you believe him to be. Whether he is God or chosen by God is entirely up to your beliefs. If you already managed to believe all sort of things about God and Jesus how come you can be bothered by a why question? Go ahead and believe something else for God's sake and you'll be just fine!
The Son of God, come in the flesh, to die to pay for the sins of all those who repent and trust in Him for salvation.
Jesus was a human being who said some wonderful things about how to live on this planet.<br />
There have been many like him. In Buddhism, they are called Bodhisattvas. He is certainly the bodhisattva of our era.<br />
I can't imagine he's very happy about all the evil that has been done in his name. He spoke of love and compassion, but Christianity is mostly about hate and fear.
I think there are others like Jesus, but there is only one Master, and that is Jesus. He, himself, said that we would do greater things than he did.