Ah now you've got to be careful with the use of a marksman.
A single arrow in reality can be constituted as a one shot kill, unless it's a massive enemy like a giant or a dragon.
And unless it's an enemy in heavy armour, in which you need special arrows.
So if you're going to do an archer, take into account that up close you're are going to struggle in an engagement, the wind and weather will affect your shots etc.
You can still make an archer, but please be careful when it comes to fights.