Actually had a greatshield build idea, Greatshield Soldier Ashes use these lads (if you haven't tried the ash out, it's 5 bros wearing nothing but helmets and two-handing greatshields) and dress accordingly. Just bully low poise bosses with the bros.
Sadly those guys die too easy to magic damage or anything that can past their guard and hit them from the flanks. But if you corner some enemy with short range and only physical attacks, it is hilarous to watch them strugle :D