Tough call.
I'd really have to go with the old Cinemaware classics; Defender of the Crown, and Lords of the Rising Sun.
If I had the time and patience I'd love to mod Mount & Blade: Warband into a Defender of the Crown or Lords of the Rising Sun remake. It wouldn't be too hard to involve all the elements: you've got the tournaments, sieges, battles, night time raids, and the rescue of the damsel in distress! In LotRS, you've got frickin' ninja attacks, there's the hot Princess to rescue, and there's the awesome minigames after battles where you ride down and massacre the fleeing general. WooT!! Damnit ... where's my Amiga Emulator ... *disappears*