Your dining area is kind of predetermined by the chandelier placement. It seems like a 48" round table with 4 chairs would be great for that spot. The wall next to your entrance would be a great space for a console table. If you get one with legs, you could tuck two ottomans under it for seating. I would put a console on the left wall with a t.v. above it. Have the couch face it and add two chairs with their back to the dining area in a L shape with the couch. Add a great piece of art above the fireplace. Add an area rug to bring the space together. Not sure you have room to add a lounge area as well. What's your budget for furniture? What colors and style do you like?