A game with:
The combat of War of the Roses. Think Mount and Blade, but with different armor types, weapons with different damage types, usable visors that function and restrict vision, and of course cavalry and lances. More realistic, however, WotR armor is typical hollywood paper armor.
The voxel engine of the current 7 Days to Die release, but set in a medieval fantasy period and with more variety and/or random prefabs. Think Minecraft, but without the blocky look - actual smooth terrain and decent looking enemies. (Earlier 7D2D was still blocky.) Also the underground chasms, caverns and abandoned mineshafts of Minecraft. These were fun to explore.
The lore of Forgotten Realms, in a setting that is largely wilderness and frontier with very few civilized bastions. Just because preference.
A magic/skill system similar to that of Guild Wars 1, where you can learn skills from trainers or killing rare enemies, and they may have powerful synergies, but you can only equip a small handful at any one time. I prefer low/no magic fantasy. For a more realistic approach, this could be changed to artifacts, such as shield spikes that unlock a shield bash, weapon poisons for special attacks, and so on. Death causes the ones equipped to be lost.
The town-building mechanics of something similar to Millenaire, a mod for Minecraft in which you can help villages expand as well as found your own villages on your own, which will populate with NPC villagers, stage raids, expand, etc. Alternatively any town building sim that fits well.
The day/night enemy system of 7 Days to Die, where day time enemies are slow and isolated, and you explore, build and gather, and night time enemies come in fast, vicious hordes, when you stealth and/or defend.
The campaign system of Warband, where you can give your allegiance to a lord and fight for their cause, and ultimately aspire to become king of the lands. In this case, less conquering and more exploring and building, in combination with lots of town defense. Also, the scale of battles of Warband as well, with potentially hundreds of AI troops.