I can recommend the Fireforge Games cav models. Mounted men at arms for the villeins, and use the Crusaders and Teutonic Knights for your knightly orders. For Forsaken knights, Zvezda makes a box called "elven light cavalry" that look like Valkyries riding Pegasus. You get 9 for $20 so
Personally I didn't like the ones in chainmail bikinis so I replaced those with fireforge knights, but 6 are dressed in suitable armor
IMO. They look small next to
GW knights but are pretty close to most historical minis like Perry and Fireforge.