Easy: Demon's and Dark souls. The perfect RPG combat system.

Each weapon has dozen of stats, are perishable, has and feel weight, length, attack distance, may or may not cause opponent's guard to open, needs repair, are modifiable, enchantable. You have to think every attack and even the weakest mob may kill you in a few hits if you don't pay attention. Your armor has several different stats as well.

Skyrim + Demon's Souls combat would be the game of the decade.

I pesonally hated Dark Souls combat and enjoy the Skyrim one far more. But thats just my opinion I guess.

Well I love the combat on DS/DkS but that combat works for that game and the way it is in Skyrim works for it so i'm fine with the way it is now.