For a Fourth Ring Wretched deck, you'll want to start Valeria Batten and Margaret Hagarty to do some inventin', and can bring Dabney Scuttlesby and possibly also Dr. Dawn Edwards as backup scientists in your deck. Eights will fail your pulls with Dawn, so be careful if you main value eights with her. A Pagliaccio or The Brute should also be in your starting Posse, as a cheap sacrifice for your first Wretched.
10s would be a good value to look at. Henry Moran is more Wretched fodder, Avie Cline is harrowed so only gets discarded when used to invent The Wretched, and Max Baine (Experienced 1) can give you a discount on your high value dudes - more ghost rock to spend on Wretched . 10 is also home to Unprepared, a strong Shootout action card.
Q gives you Soul Cage, which against a cheatin' opponent can bring back your Pagliaccio or Brute again and again for Wretched inventin', or even grab The Wretched itself. The value is also home to some great deeds and actions.
K brings Ivor Hawley (Experienced 1), who gets cheaper the more Abominations there are in play/Boot Hill, and can also bring Abominations back from the grave. It's also home to Fancy New Hat, which would let your Wretched take over the town, and Point Blank and Election Day Slaughter if violence is your way forward.