I think teaching kids about a fictional character (at the very least, it seems to be unclear if he was a real person) is saying that the world never gave us real heroes, humanists, people of high moral values. People who have actually done something for the society, not only spoke some poetic stuff. Even now you can find an example of folks who are trying to bring peace, fight injustices etc. And they are not gods or anything, which makes their sacrifices even more valuable.
Making an example of another person is much more effective if your goal is to set the raw model. Other people have done that, means you can too.
The Jesus of the Bible is not the Jesus you are planning to teaching to your kids. There are far better places and far better reasons to hold the values you are describing outside religion of any sort. It the Bible really the best that can be done in the area of values and morality? Is Jesus really that profoundly wise and admirable a person that you focus on him. Why not Ghandi? I disagree that Jesus "ranks right up there" and the only thinks you know are from a biased account dedicated to crafting a Jesus you probably would not much like.
By accepting what you like in the narrative of Jesus and rejecting what you don't you are already using your reason and moral sense to verify and vet your morality, why bring Jesus into the picture?
The absolute BEST thing you can do for your kids is to model a life of peace, joy, wonder and love.
Talk is cheap and idealizing the dead is bullshit. If Jesus was a human being, then he dealt with the same issues that you do. Only rather than managing the difficulties of human existence as a rational adult, he took the easy route.... magic, invisible daddy.