The yellow and white art you have leaning against the accent wall will really pop on that wall. You may want to put some dark wall decor above the couch to make that wall pop. I like the set up in the link below (but not the bizarre lady clown thing!).

https://www.houzz.com/photos/northbrook-house-contemporary-living-room-chicago-phvw-vp~726638

Find wall decor from local artists or art.com. If you go with art.com, buy the prints from there, and watch for 30% off sale on AC Moore frames.

papiers peints panoramiques, maybe the best and luxury wallpaper for you.
Developed from the block-printed panoramic wallpapers developed in
early 19th century France and called: Papiers Peints Panoramiques,
the beauty of nature landscape pattern into a home. Every paper is
handmade by skilled artisans and each one is a true work of art. The
epitome of luxury, beauty and fantasy the paper can be customized any
way the client desires and made into matching pattern fabric. this
natural landscape wallpaperpaper in a big room is a look and that will
never tire of!! stunning luxury! For everyone else, enjoy the way
designers have used these gorgeous papers in the pictures below!

Whatever
the wall is 6ft high or 10ft high walls, the custom design can fit the
wall size! 100% handpainted and high quality hand-painted wallpaper.
wallpaper in production: