May be some gallery pics. Or one big wall art.

Couple of options here. You can create a rather large gallery wall if you have enough photos. Otherwise a large scale piece of art with a vertical orientation would be gorgeous. Few ideas:

(Source Galiant Homes in Colorado Springs, CO) one of our current designers worked on these projects before she joined our team.

Rather than hanging something on the wall, why not add battens? And, get a more imposing light fixture.

Or, wallpaper:

I have this paper in the powder room. Ceilings are high and it gives the vertical pattern space to "climb" the wall. Love the look.

Your house is beautiful!!!

Love the bench!!

I think I’d blow up black and white family head shots of the kids or something….

So beautiful! I do love how minimal it is. Large sconces would be beautiful for controlled mood lighting. Or smaller sconces above art if you choose to add art.