I have more questions than answers: What is your price range / budget for furniture. How many are you in your household or how many butts do you need to seat here?

I was confused - do you want to replace the wall unit where your TV is too or do you just want new seating, coffee table, end tables?

Thank you for not placing your TV above the fireplace!

Blinds drawn and no coffee table needed. An option is delete the tv furniture for an 85" wall mounted unit. Then stadium seating with more seats in the back row. Or just a raised back row and a sofa in front with large ottoman/table. Everything gone on the tv wall for traffic flow.

The Most Common Types of Entertainment Room Seating

An eclectic mix of furnishings would make the room interesting.

You have plenty of room for two 3-seat sofas, in a light performance fabric.

Since your built-in is a different wood color than your perimeter kitchen cabinets, I would consider painting it the same white as your island, as it would definitely brighten up the space.

Get rid of the mirrors over the fireplace and replace with a large colorful piece of art.

Get rid of the mirrors over the fireplace. Two sofas...and a coffee table...artwork. Your room looks very heavy with the dark leather, dark floor, dark rug....lighten it up! TV surrounds are pretty much "done"......out-of-style.

Entertainment system stays, so make it work. Paint the wall behind it the same color as kitchen cabs.

(Remove all the tchotchke for now).

Paint the fireplace surround and the wood trim on hearth the color of the walls...use a satin finish.

Window blinds work with the entertainment center.

I see this: white rug, light gray sofas, up off the floor, facing.