Obviousness is obvious. I quite like knights and all, be they the classic feudal sorts or those of Orders. Several times I have based them off of the likes of the Templars and Teutonic's. Though I've looked through plenty of other things, from the Arthurian mythos and their many offshoots in...
chivalric orders
eld stuff
knightsknights errent
knights hospitallar
knights of chaos
knights of order
knights of the round table
knightstemplarknights tuetonic