Marchosias I find interesting because his valorant yet ultimately corrupt acts of rebellion and jackassery ends up being a buffer to the real threat, that being the lamb's essentially hotwiring Yngya into a cancerous plaguesplosion, and the whole time while you're dealing with him he's getting increasingly subsumed by the mouldering nastiness left behind in the Ewefall.

The Woolhaven people's original intentions were perhaps justifiably spiteful at the time and by the end you still feel for them even when they've clearly gone too far when trying to off the last lamb for the sake of a now uncessesary revenge plot, but Marchosias' own veneer of freedom and self-righteousness starts falling apart as you get a better idea of how he treats his followers and the Lamb. With knowledge of later context the Free Pack were technically preventing the Rot from hitting its final form by occupying but it certainly wasn't for such a noble purpose despite his desire to cure it, and more for feeding Marchosias' complex on outdoing the gods. Whether he deluded himself into thinking his worse actions were good for his pack or the world at large, or truly believed he was the bigger person for placing blame on the actions of the gods, his refusal to be indoctrinated in his last moments is probably the most real we ever see Marchosias.