I exempted Fields in my post. Cousins was the only one I thought might get me bit the others, no way. Three starts and he is already better than most of your list as juniors or seniors.
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Braxton Miller was 2x Offensive player of the year and 2x First team All-B10 as a QB. I like Penix but he's nowhere near as good as Miller (yet). Not better than Haskins and not better than Cook either. We can have this conversation in 3 years.