Looking at the picture from the direction you were standing, what throws me off is the style and color or your bar stools which you have paired with your dining set. That affects what to do with that wall, for me.

You don't have much room. I have become a big fan of decals (quality ones) because they do a great job of filling an awkward space, are relatively inexpensive and easily removed.

Something like this would, IMO, look great with your dining table/chairs, the brown molding.

The bar stools match the kitchen cabinet color and I do plan on painting trim

I would have to agree with Judy that when one opts to eliminate the traditional separation of the kitchen and the dining area via the introduction of a half-wall with bar, the rooms should be joined stylistically. They are no longer to be understood as two isolated spaces but as a singular whole.

What do you suggest - changing the barstools? To what?

I would try a collage of different size pictures.

. . . or a large scale graphic wallpaper that would be reflected in your mirrors