If by platoon with KK you mean Varsho shifts to CF and Duvall/Grichuk plays LF, it seems the team might be planning to use Babe Schneider in that role to start 2024. If you mean a double platoon where Davis Schneider still plays LF against LHP starters and Duvall/Grichuk starts at CF, that's an interesting idea although I doubt the team sees Varsho as a non everyday player. That would basically make him a strong side platoon LF.
If I had to rank those DH options I would probably go with
1) Hoskins, signing him to be the everyday 1B would allow the team to move Vlad to full time DH where he belongs.
2) Soler, everyday bat who can see some games in RF too if needed
3) Joc, strong side platoon bat who can see some games in the OF too if needed
4) Teo, despite being an everyday RF I have him lower than Joc because I just don't want him back. Maybe having an everyday RF like Teo would help manage Springer's health because it would basically make him the DH, although I really don't want to see Teo and his atrocious OF defense back.
5) JDM, I would rather see butcher RF Teo back than add a DH-only type like him. We already have a future DH-only type in Vlad Jr.