Nice room. That hearth looks like a stumble hazard. Do forewarn your guests, especially any elderly guests. Consider painting the metal staircase black and it will go well with any color you choose and the hearth as well. A neutral wall color that would go with the brick that is not gray could be Sahara Desert Sand or something similar -- a tan without a pink or yellow hue. You might consider a full window length swag valance for your window -- choose "natural" for your color. https://windowtoppers.com/collections/kitchen-curtains-and-valances/products/roslyn-3-piece-tailored-country-swags-filler-valance-window-curtains-set-with-banded-edge?variant=46144210566 Edit to add: while I was looking for a link for the swag for the window, two people beat me to it. Yes to black stairs.

60” love seat with two ottomans: Leaves space for reading chairs on either side of window and console table at window with lamps.

oh, ok yeah-- I see that the corner is the best spot. the fireplace is too tall and the ceiling too low. a TV would look crammed up there, plus it would be very uncomfortable. if the couch is the favorite seat, then I think the viewing angle would be best if you mounted it flat on the wall, not the corner. try it out-- find a small piece of furniture in your house (or a crate) to temporarily move over there, and set the TV on it to see if you like the angle. due to the heat pump, is the radiator decommissioned? can you remove it? or if it's still working, consider a custom piece that covers it on the left while allowing ventilation. I feel like something wide would balance the space: or a small piece that fits directly under doesn't have to be a TV console. it could be a bookcase or cubbies. I've even seen benches used for this. ikea Kallax -- 30.3" wide: bench:

IMO painting brick is the fastest way to devalue your home so if that is the plan go for it. Gutters are not decor items and should be as invisible as possible. Plus we need pictures posted here in comments DO NOT start another post.