I would consider either white or a blue close to the carpet color. Do you pull the blinds up during the day? Get enough panels to add fullness when the drapes are closed.

Grommet panels with a 2.5 - 3 fullness in a light colour, as suggested - taupe, cream, bone white, would work well in the room. I would leave the runner but remove the rug.

I would suggest you go with a beige or a tone close to that of the wall. Choose a tone that is a bit darker and not lighter.

I would try to find drapery panels that match the color of your rug.

Too bad your buffet isn't a bit larger. I extended it in the image.

You can extend the visual appearance of the buffet if you can place a dining chair on either side. Maybe you have 2 extra dining chairs. That way the art you installed won't seem so awkward because it extends further than the length of the buffet.

A multi light chandelier would give the room a bit more texture.

I love the look of simple grommet panels. The fabric you chose with Revere-Pewter would be beautiful!