Will there be a TV in this room? Have you tried turning the sectional so one side faces long wall. Then you can add a console with TV or art above it and a nice rug to anchor your room.

It does seem too early to pick wall decor…after furniture arrangement…tv location….tables…rugs…and then a fuller view of the room…it would be easier to decide on art

The couch seems very contemporary and the fireplace seems rustic…choosing pieces that unify the look will lead to a more cohesive result and a guide to what will look best on the wall