Bawylie
A very OK person
Oh, wow. That's an interesting and simple idea.
I think you'd need to give the class multiple fighting styles but they can only pick one at a time.
I love the idea of four sword & board melee types all having Protection style.
I don't think you do need multiple fighting styles on one person, but it's certainly helpful to have more than one in a group.
Anyway, I got the idea from your shield wall idea and tried to make it a little more broadly applicable, or like, not tied down to defense. Then the fighting style thing hit me.