I'd rank them Schmidt, Mooney, Benak for now. Still only November 3rd, so maybe I'll change my mind.
Think Schmidt ends up a 2nd rounder. Mooney probably 3rd, but if he overcomes the injury and can put up good numbers 2nd isn't impossible. Benak is probably round 4 or 5 at this point. I think someone will take him, but if he doesn't get going soon he might challenge that and be pushed to 6th or 7th round.
And yet those players fell there. NHL teams don't have time for these types of players in the first round. Add Lane Hutson to the list. Seamus Casey. Plenty of others.
There are few exceptions. If you are shorter than 5'9 (potentially even shorter than 5'10), your chances of going in the first round are nearly zero. Your junior hockey accomplishments become nearly irrelevant, and NHL people think different from us fans.
I've learned this over the years. A lot of the small players I like go much later than I think they should.