Great fabric on your chairs. I'd pull the tan (second lightest color) for an area rug. I can't tell the color of your sofa to suggest a color for an ottoman, but I do think a long narrow one would work well in here.
By the darkness of your photos, I would suggest more lighting using daylight bulbs. It's amazing the difference they can make to a room.
If there is room at the opposite end of the sofa to put one of the two chairs I'd suggest that too. By what I can see if it, it looks like a lovely room for relaxing with family and friends.

Another thought, it could be that you took the photos facing the light. You're best to take the photo with the light behind you.

Thanks so much for your advice! There is big tv unit in front of the couch so no space to move the chairs

You're welcome. Our favorite place to watch TV is in a similar room. We actually are using a mid length bench in place of an ottoman. Something we already had. It wound up working so well that I've not looked for a replacement. I might once the walls and ceiling is finished. Just made another big step in that direction today.