Want realism? Suuuuuuuure, nothing can hurt platers but half sword stab, most polearm stabs and the 2 hander pierces and blunt weapon, even the fucking long espada wouldnt do shit on plate armor. The pierce and blunt 1 handers might hurt the guy inside the armor, bow would be uselss, and only the arbalest and maybe the heavy crossbow if its branch are made out metal.
A metal shield wouldnt be breakable, but on the other hand something like a steel shield or a plated one would too heavy to use.
And blablabla many other things.