This is a good list, we can narrow it down a bit further though.
Royals are getting Pasquantino back, so between him/Pratto/Melendez/Velazquez they look pretty full at 1B/DH
Minnesota reportedly needs to cut payroll (which is why Polanco and Kepler are on the block)
Padres seem to have enough payroll room for another move or two, but it seems really likely that anything else major they have will be pitching oriented
Rockies have said they're moving Bryant to 1st this season, and Charlie Blackmon at this point requires a lot of DH time
Spencer Torkelson finally broke out in the second half last year for the Tigers. That said DH looks wide open if Hoskins is willing to primarily do that (like you say seems unlikely though)
Similarly the Angels can't offer 1B (Schanuel) but they can offer DH (unless Rendon moves there full time?)
So that leaves just Milwaukee, the Nats, and the White Sox? Even if we open it up to DH-only it only adds in a couple more teams (Angels, Tigers, Dbacks, maybe Mets). But then that also widens the player pool with guys like JD Martinez, Jorge Soler, Michael Brantley, etc.
Between this exercise and the surprisingly team friendly Garver deal, feels pretty clear Jed has opportunity to clean up at 1B/DH this winter on the cheap. Even though I like his combo contact/power bat I think I'm moving away from wanting Josh Naylor.