There doesn't seem to be any "Steel Plate" weapon (understandably - the "plate" part is for armour ) but I was wondering what is generally accepted as the perfect match for full Steel Plate gear - in terms of aesthetics, as well as power level.

I use a steel greatsword in the real world historicly the mace was a popular weapon among knights, and the one handed sword and shield is a good knightly look.

skyforge steel is good