I'd probably place a small, round pedestal table by each chair so that the view of the FP wouldn't be blocked. It would be nice for guests to have table surface on which to set their drinks.

I think if you are not using the fireplace, I would set a round commode table there, between them, move them closer together. Get one with some bulk to it and you can also place a plant upon it, perhaps one that has a door that opens and closes (but is obscured)or one that has openings where you can tuck magazines or whatever away.

If, however, it is not large enough to accommodate drinks you could have a thick piece of glass cut round or square to set atop it.

You should be able to find such a table in many of the consignment or second hand stores, as the people who are in love with the lackluster ramshackle junk a/k/a furniture coming into our harbors in great steamers, the tasteless soulless are abandoning their parents and grandparents wonderful furniture en masse to consignment stores, flea markets, tag and yard sales.