There was a good Royalist? I’m guessing you mean Rene, because it sure wasn’t Gary the Cryptofascist or Measurehead or the Racist Lorry Driver. Imo the only thing that stopped Rene from becoming someone like Dros were his relationships with Gaston and Evrart. If he had been “alone” the way Dros was then the investigation may have gone quite differently
Maybe Cory Doctorow?