For what it's worth, Callis, Dykstra and Mayo agree on Chalmers: https://www.mlb.com/news/these-prospects-could-be-future-closers?t=mlb-pipeline-coverage.
I think they all make sense for the reasons you describe, but I doubt we see them all at once. For now, Alcala, Colome, Duffey, Robles, Rogers, seem like locks, with Thielbar, Law and Anderson the other three. With their past histories, Duffey and Colome are going to have long leashes, and the latter has started to look better.
With the 17 games in 16 days stretch they are in, I suspect we'll see heavy use of the Light Rail Shuttle. I wish they'd keep either Dobnak or Thorpe around for a time to serve as a true multiple inning reliever. When a starter goes five and they are still in the game, it would be nice to go to one of those and think that they might have a shot at finishing the game.
Thielbar was so good last year, but with such a small sample in 2020 and his being 34, I suspect he's the next DFA candidate. If he continues to struggle to the point of being cut loose, I think it makes sense to go to Cano next, unless Stashak has bounced back to the point of getting another shot. And of course, an injury speeds up the tryout list.