As for Jesus existing, those who doubt his very existence are in the minority. There is no evidence to suggest he was not a real person.
______________________
There's no evidence to suggest that JC was more than a regular person living in the middle-east. Remeber that the bible is not a credible source as much as you want it to be.
****
Actually there are a number of scholars who believe that Jesus is really a composite of legends and people. We do know that the early church tweaked what is now the bible, to work in line ancient Hebrew messiah predicitions.
Also, he's not referenced in a lot of places one would think he should be. Outside of the Bible, which as you say means little in that regard, any reference to him is very sketchy. It indicates that he either never existed as one actual person, or he wasn't so important at the time.
As far as him being a diety himself, I have no reason to believe that. If he created such miracles, surely he and the miracles would be mentioned somewhere else. Instead, it seems more logical that the story grew with time. We know that the texts of the new testament about Jesus were written many years after his death. Imagine how much a story grows at the water cooler in the corporate office between morning coffee and lunch. Make it about 40 years, and add religiously fervent people, completely ignorant by today's standards. To my logical brain, that's the more likely explanation for the 'divinity' of Jesus.