What is that space ? What is the furniture that is going in there , what is your style really this is ablank slate without info. I would do a wall of Besta from Ikea with a cabinet low enough for proper viewing height some storage and display in a color that works with the rest of that spaces furniture. I like a low cabinet wider than my TV so I can go larger later if I want .These are 2 of 100s of ways to put the pieces together