Well, insert a church father who signed the Nicene Creed in place of Peter and insert "Joseph Smith" in place of "Martin Luther" and you'd sound like a Mormon!!! :)
LOL! We don’t have quite so narrow a definition of Christianity. If you believe Jesus Christ is your Savior and Redeemer, and there is no other way to return to God’s presence, I think you pretty much qualify as a Christian as far as I’m concerned.
Of course, before you can say who is a Christian, you need to provide a definition.