Your transparently false premise is that humans--even prophets--are capable of achieving absolute perfection in mortality. I think you know better than that. There are degrees of perfection. Whom will you follow? A person who has made minimal progress toward becoming perfect, or one who--like Brigham Young--made exemplary progress toward becoming perfect, warts and all?
All the hand-wringing discussion that occurs on this thread comes down to one overarching fact: You are a closed-case atheist by your own admission. Consequently, for you, God doesn't exist--and never will. What that means is that there is nothing a faith-based person can post that will be acceptable to you. Thus, exchanges with you are merely exercises in debate, which, I confess, does have value as entertainment.