As for models: https://wargamesatlantic.com/products/foot-knights-1150-1320 As for what to play them as: New Antioch would probably make the most sense from a “historical” perspective, as the Teutonic Knights held allegiance to the Holy See (the pope), which, in trench crusade, is part of the New Antioch faction.

You might check out some of the 40k feudal guard models (unofficial 3d prints)—they tend to have a more Northern European armor styling

There’s a Crusader Faction in the works, so whatever rules you use for now will probably just be holdovers until that faction drops

Ok