Since we already have Pawn, Knight, Bishop, and King('s Court), we need a Queen and a Castle.
The nobility has King, Princess, Duke/Duchess, Count, Margrave (equivalent to Marquis), Baron, Knights, and generic Nobles, so all we need is a Lord (to govern a Feodum) and possibly an Emperor.
Craftsmen don't have an order, but we have a Woodcutter, Coppersmith, Ironworks, Forge, Armory, and Ironmonger. We still need a Mason and either a Goldsmith or a Jeweler, and we're a bit heavy on ironmongery.
Thanks primarily to Prosperity, the monetary trades are already covered. We have a Counting House, a Mint, a Bank with a Moneylender to issue a Loan, a Venture for your investments, and a Trading Post with a Trader to change your money. I don't see anything missing.