I think Harrison, Nabers, and Odunze are all just studs. Harrison's the best of the bunch, but there's not a big gap between him and Nabers. It's almost like an AJ Green vs Julio Jones situation... speaking of that, Harrison is a dead ringer for Green.
I think JC Latham is the scariest guard since Quinton Nelson, stuck playing tackle. Just kind of a lunger and bender, but he is huge and impossibly strong. I don't know how you rank him about Alt and Fashanu, though. Those guys both look like NFL tackles trapped in college and carry almost zero risk. If your plan is to play Latham outside, then I think there's a little risk.