Are you looking for something turn-based? You already mentioned some of the best titles and I doubt anything will compare. I'll go on a limb and say give Mount & Blade Warband a try. Odds are that is outside your request but in the unlikely case that you have not played or looking into it yet - try it. Get through the annoying tutorial and enjoy one of the best strategy/RPG/BallsDeepAction games ever made.
As for the TW games, Rome TW is widely claimed to be the best of the series I think. Not vouching for it myself as I never got into any TW games.