Fangraphs top 50 free agent list is out, along with crowdsourced contract projections:
https://www.fangraphs.com/blogs/2019-top-50-free-agents/
A lot of the starting pitchers jump out at me as being good targets for Shatkins at their approximate projected contracts:
Keuchel 4/80
Morton 2/32
Kikuchi 4/52
Ryu 3/40
Happ 2/30
Cahill 2/15
I'd be thrilled with any of those, and ideally at least two of them.
Also, Brantley at 3/45 would be fantastic, and might even be feasible given that he has a history with Shatkins.