Billy bookcases from Ikea could cover that arch. However, you should plan to have furniture not necessarily hugging the walls. For us to help, please supply a detailed floor plan with measurements of all windows, doors, arches, etc. If you have furniture that you hope to use, please supply a photo and measurements of it.

That’s very clever with the bookcase .

This could also be another idea. I would prefer this, because I am not a fan of floating sofas, plus, I wouldn’t want my sofa in front of the front door. My mockup is not as neat and professional as yours, but hopefully gives the general idea. If possible, I would put a tv on the wall that’s adjacent to closet, wall mounted with a (slim) floating shelf console. Some type of art over arch. Side chair facing windows and door.

A row of IKEA Billy bookcases along that wall, attached to the wall with drywall anchors. Cut your tv opening. Sell on FB when you move.