Corey Pronman in the Athletic a few weeks ago had a story on all upcoming free agents, NCAA, junior and foreign. Of the four guys you mentioned here were his ratings.
Strauss Mann -- rated 3rd. In projected NHL player tier.
McKay -- rated 27. In Long Shot Tier
Pelton-Byce -- rated 21. In Long Shot tier
Kawaguchi -- rated 11. In Have a Chance to Play in NHL tier
Other NCAA free agents he rated:
Matt Kiersted - D - North Dakota: rated 2. In projected NHL tier.
Akiot Hirose - D - Minnesota State. rated 9. In Have a Chance to Play in the NHL Tier
Marc McLaughlin - C - Boston College. rated 10. In Have a Chance to Play in the NHL Tier
Parker Ford - C - Providence. rated 12. In Have a Chance to Play in the NHL Tier
Josh Dunne - C - Clarkson. rated 16. In Longshot Tier. Just signed with Columbus
Chayse Primeau - C - Nebraska-Omaha. rated 18. In Longshot Tier.
Brandon Scanlon - D - Nebraska-Omaha. rated 20. In Longshot Tier.
Make Hardman - RW - Boston College. rated 22. In Longshot Tier.
Ben Myers - C - Minnesota. rated 23. In Longshot Tier.
Adam Scheel - G - North Dakota. rated 25. In Longshot Tier.
Odeen Tufto - C - Quinnipiac. rated 26. In Longshot Tier.
He separately rated college draftees who could become free agents (s0me may opt to return to school). His top five were:
1. David Farrance - D - BU. Nashville draftee. In Projected Good NHL player tier.
2. Ronnie Attard - D - Western Michigan. Philadelphia draftee. In projected NHL tier.
3. Tyce Thompson - C - Providence. New Jersey draftee. In projected NHL tier.
4. Nick Abruzzese - C - Harvard. Toronto draftee. In projected NHL tier.
5. Collin Adams - LW - North Dakota. Islanders draftee. In projected NHL tier.
Depending on what we do with our goalies and what Wall and Huska show the rest of the season, I would love to try to get Strauss Mann from Michigan. Dryden McKay is another kid with great skill. Both of these guys are small, but I feel like we have a good track record with smaller goalies (and a worse track record with large goalies).
Ty Pelton-Byce has an interesting combo of decent size and good skill. Jordan Kawaguchi from NoDak is a forward I'd like to take a flyer on. Small but really good skill and instincts.
There are other guys who could become free agents. If he doesn't sign with Nashville, Farrance is a guy a lot of teams will want.