Kingdom Come: Deliverance (with a couple of light mods) is really good.
M&B: Warband is third person, but yes, also really good. Haven't played Bannerlord yet.
If we are talking third person, Gothic 1/2 were quite good for their time, and Risen is good. The new Zelda games also have well designed action combat. Sekiro. Nioh, etc. That combat game, Hellish Quart.
To design a good melee combat system, you gotta abandon a lot of terrible historical design tropes. Stop with the mindless attack spam, the rolling, the infinite length blocks, and many others. You gotta understand that real melee combat is reactive and dynamic and complex. You do A, enemies responds by doing B, you adjust by doing C, and so on. Parries, ripostes, dodges, footwork and movement, different attacks and combos, feints. Just watch any good movie duel, imagine if we had those systems in games...
Instead you got shit like this, where you hurl a cold turd at someone and it freezes them, and then you hit them with a sword. Yeah...