There is the rub though isn't it. You are asking to define what has already been defined by Christendom and rejected by the LDS. Christ is a specific person defined in a specific way belonging to a particular group of people who despite some often serious differences agree on the main points of the faith.
That is what makes this particularly egregious. It is as if the Jews all of the sudden want to be called Christian because while not being the savior Jesus was a great Rabbi.
Christ does not "belong" to a particular group of people. Despite your attempts to claim ownership of Christ, He is available for everyone to worship and follow, even Mormons.