Marquis.
Short, Beech's UK Distributor ’59-66, licenced Baron as P.D.52, Marquis as P.D.54, Queen Air as P.D.58/64, but abandoned the biz sector in 1962 when an RAF taxi order went to (ex-Bristol) Sir P.Masefield’s BEAGLE as B.206 Basset. Marquis died not so much due to King Air, but to P&W(C)'s customer-friendly orientation on PT-6A. Astazou was not presented to market in the same way. Piper PA-31/42 Cheyennes and Cessna 425 Corsairs did fine below King Air.