Just a thought before you buy a coffee table and chair.

One couch seems to be blocking the entrance quite a bit. Have you ever tried the couches facing each other?

Then skip buying chair and look for a rectangle coffee table, so the couch can be closer in. I‘d choose a lighter style to keep the space feeling open and airy.

If you need more seating, you could add two smaller sized chairs facing fireplace.

Another view of the space- it’s really just a long bowling alley layout

If not too much trouble, try moving the couch to see if you like and take a picture to see what people suggest.

What about three small square tables?

I would use a rectangular or round coffee table centered in front of the loveseat, and then use end tables on each end of the sofa. That gives a useable surface for each seat. A glass or stone topped table would be nice in the space.