This is a really cool room with lots of character! Do you want to keep the style a bit more midcentury modern to fit the vibe of the fireplace, or do you have a different style? If you have any inspo pics you love, it will help to post those!

Depending on the size of the room and TV placement, a sectional could be great to allow it to flatter and face multiple feature points. If you'd like to send me a direct message with the room measurements, I'd be happy to do a quick layout for you!