I think empty space is a luxury enjoy it add a great piece of art

I like this bookshelf idea too - with plants, or special pieces from travel or memories of family? You could do a photo wall with black & white pictures of....family? Pets? Friends faces? Then make the mats (or the frames) different shades of one color. (And could bring some of that color onto the couch with 3 pillows of that color)

OR, if you want to throw some whimsy to your room - buy a skeleton, spray paint it an outrageous color, hang it & add a fun hat! (I have a mannequin that I've painted a few times & decorated for different events - right now she is gold..... )

Help any?

The room is beautiful and well put together. I would say don't add something just for the sake of filling that space. If you see something you love that would be perfect for that spot, go for it, but don't fret about it.

Art always works.

Would 37" square be so bad? aligning bottom of tv and art possibly...

Petals In The Wind II by J.A Art Canvas Print, 37"x37" · More Info

Sara's Garden Petal Decorative Throw Pillow, 17 Inch Square, Red · More Info

Art seems like the nap-py rug -- but I didn't read any color wish of yours... ?

Uttermost Blue Waterfall Art · More Info

Sara's Garden Petal Decorative Throw Pillow, 17 Inch Square, Teal · More Info