Enlarge your floorplan ( for you) enough so can make some to- scale furniture rectangles & squares and try them out. Or can use a digital program if you know how.

Remember the furniture can’t be so tight , like a chair buttered up at right angle so that 2 people are in same leg space. And need too for legs and walking around the coffee table. Plus figuring distance from TV and size. Another thing people do is use some existing furniture , tables, cardboard boxes or taping off floor, to get a feel for what fits. Using 3-D objects is best because it gives you a more realistic experience of what it’s like.

It will be much safer for you to play around with these exact measurements on your floorplan or in your space than to ask people here and then order something & be surprised.