I would have to say the Chevaliers would be my best guess, not because they say so or because they're Orlesian. My reason is based off of what Sir Michel says throughout the masked empire book. He constantly says how they are trained day and night to fight just about everything imaginable. They're trained to fight bards, mages, Templars, bandits, demons, even darkspawn and the undead for crying out loud.
The other thing is I only count chevaliers that actually keep in shape, not any of those nobles that went through the training and couldn't be bothered after they finished. So chevaliers like Gaspard and Michel would be my ultimate answer. Only because they are trained to never hesitate and they have the most experience fighting any opponent. I would love for my characters to have that kind of training.