The New Republic

Okay sure, Din is contracted to the New Republic right now, but consider this: the New Republic sucks, even beyond the “well at least we’re not literally the Galactic Empire!” kind of way. Remember the early days of The Mandalorian, when a Republic presence was just as much a cause for concern to Din as an Imperial one was? Where an X-Wing carried almost as much implied opposition as a TIE Fighter? Maybe it’s time to bring back a bit of that independent vibe.
The New Republic don’t have to be explicitly evil to be antagonists of The Mandalorian & Grogu, although they’re already at the “so we renamed the torture device something nicer” stages of neoliberal evils. But there are plenty of ways they could be in opposition to Din’s goals that make them reluctantly at odds with each other—especially at a time when the New Republic is going to be in crisis trying to deal with Thrawn’s return.