I didn't realize from the first two photos that was an entry way , so that changes my recommendation for the sectional. I'd skip that now and if that were my room, with the TV being up so high, I'd put a dual power recliner loveseat (battery powered, so no cords exposed) with articulating headrests so you can dial in just the right TV watching positions. Those high mounted TV's can really challenge you for good viewing angles and and if its an LCD unit (probably) it should be tilted down some, the screens are not designed for off-angle viewing.

The loveseat would go across from the fireplace and TV. Then I'd get a coupe of swivel chairs to flank that piece. Assuming you don't need more seating, this still leaves lots of open space and preserves the beauty of all those windows out into the back deck/yard. Both Bradington Young and Hancock and Moore have pieces that would suit this layout.

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