I have a house with an odd shaped living room. It’s fairly open concept, and leads directly into the kitchen as well as the dining room and foyer. I am getting new furniture and would love suggestions on what pieces to get, as well as where to put them! Our TV is currently mounted above the fireplace mantel. I’m not a huge fan of entirely matching furniture sets or Loveseats. The more cozy and conversational the better- but traffic flow is obviously critical! I’m considering 2 couches, or 2 couches the chair and a half, or all/some with 2 velvet accent chairs. I’ve included pics of the room from different angles, the grey couch/furniture I’m looking at, and a quick sketch floor plan! Thanks to anyone who has advice.

Let go of the idea that you have to have the sofa or any furniture at all against a wall. The best solution is to "float" the sofa, in your case, to face the fireplace. Get a really nice very large rug, put it in the middle of the room to anchor the space, and place the sofa and coffee table on it. Some shelving to the sides of the fireplace would be an ideal place to place a TV--on the right unless you have a huge TV. A nice easy chair on the left of the fireplace under the window with a floor lamp or shelf lamp behind it would make a cozy reading corner yet would add to your conversational grouping. Do a Google search on "floating a sofa"

This is a close up of a tweedy type rug that might work for you - I just think a darker rug will cozy up the area and complement the ottoman so much better.... This rug has been discontinued and the remaining sizes are probably too big for your space, but it might be a direction to be looking, if it appeals to you: Something like this might work, too. I can't tell for sure about the colors but Pottery Barn has samples available in store if there is one near you, refundable deposit when returned:

Can the fish tank sit on top of the record player? Those could go between the windows. Personally, I would have put the TV on the wall right of the FP where you have the whatnot shelves and would have floated the two loves in an "L" out in front of the TV/FP area. The chair and ottoman would go in the recess by the closet for a quiet reading nook. Add a bookcase and lamp to flesh that out. You can still try that arrangement, but there is not much space for seating within easy viewing distance of the TV when it is high, smushed in to the corner and adjacent to the stair area, doors and traffic path. You might seriously want to reconsider the TV placement for optimal use of the space with your current furnishings.