The Good Of all the face commanders, Y'shtola, Night's Blessed is my pick for the overall most powerful if properly built around: it's an absurd card draw engine and finisher and lifegain all rolled into one
If you gain control of a cloaked card the status of the card does not change unless noted, if it was tapped, it stays tapped, if it entered play that turn it still has summoning sickness, and you may look at it as it stays face down even if you and your opponent know what it is
This will mostly be down to preference
You can treat a learn card as a card that has some minor value effect like draw a card or create a token that can tutor for a lesson card from your sideboard
I had a very favorable early game and was able to stack my Land very quickly
When ranking these commanders, I did my best to evaluate how good I think they are specifically as commanders, not just as cards in general