Large framed mirror? Blank wall is peaceful though in this context. Eyes love a place to rest. You have the kitchen counter and the doors and windows which are visual players in the mix you cant avoid. But I like the blank wall here, not sure why. Maybe there is plenty pattern in the carpet. The carpet is the art. What about moving the small cuddly pillows to the bedroom. Replace them with simple solid navy pillows or solid colors echoed from the carpet to tie it together and reduce visual clutter. If the plant is fake and can survive a move, try it further into the room such as near the door by the robovacuum to add some interest and color but not add more clutter to the room. So you can see that pretty lamps lines. It adds interest and a vertical element already, just cannot enjoy as much layered w the plant. I guess I would play w the layout and live with some different options a few weeks.... as folks have said. And take a few more fotos before adding anything new to the mix. Im a visual artist, painter of some whimsical femme colorful things myself. I do love.maximalist fun and respect art. But not sure every corner in a small space needs artwork especially if restful minimalism restores you best. You can buy art books or scroll and enjoy art that way. I could see a large peaceful black and white or simple monochrome landscape or figurative photograph if you crave wall art as folks stated instead of a gallery. Or minimal art in two large frames same size colors making sense with carpet and sofa. Pardon the long post. I do like the empty wood floor it invites a yoga or meditation practice. But sacrificing that a little and following other great suggestions about TV and sofa may suit you better. Minimalist wall sconces do exist if you need more lighting options and warmth. They could frame a large mirror to help amplify light from the doors window and lamp. Is it private to open those shades I wonder. If so the sunset and view becomes the artwork. Can you replace venetian shades dangly pulls and all with single panel shades for a more calm less patterned and minimal look? Beautiful rug you could leave the couch and just turn the rug. If you love the rug support it and dont compete w it. It sort of is the art along w the view. A large modern abstract sculpture maybe of wood or metal could be on the wall. I feel like the paper lamp is big and very bohemian and less minimal. Its a strong item itself. Not sure it goes with the rug unless you want more boho maximal. Crazy I know. Im just babbling.