Please don’t limit your room with a sectional. So many regret this choice with rooms that don’t accommodate this type furniture. So post the measurements of this room and I can do a scale drawing and give you specific sizes that will work including possible sectional. Measurements are your friend against big mistakes and costs. Kudos for posting this dilemma and asking before you make decisions. Smart!

It is important to know that you have three kids. It's also important to know how you will use the space, which is way more important than trying to impress anyone. Is this your main hangout space, with a tv? Or is this just an adult living area? Assuming this is your main space, I would place a tv and closed door console on the wall to the right of the fireplace. You could use an L shaped sectional with the chaise portion running under the window and the main portion on the wall across from the fireplace. You may have room for another chair angled toward the window near the entrance to the room. Use an end table at the end of the sectional with a table lamp and a floor lamp in the corner near the chaise. I would look for a patterned rug and solid wood coffee table that matches your mantle. Put art over the fireplace and the wall behind the sectional. Find your main seating pieces first, and then the tables, rug, lamps, and artwork.

Really nice home and property. You could simply remove any central vac system and invest in a Roomba -- that could get rid of one something along one wall and let you square room 1. https://www.google.com/search?q=Roomba&source=univ&tbm=shop&tbo=u&sa=X&ved=2ahUKEwj1l-Ll87bnAhXJSt8KHZjVD0QQsxh6BAgPECs&biw=1366&bih=628#spf=1580785213419 For heating purposes in a large old two story home, being able to close off the stairwell should be the primary concern since heat rises. From personal experience ... if you have a wood stove, you'd be better much served putting it in a larger room or in a room open to multiple rooms. NOT in a small room such as room 3. If you have a wood heater, you could put it either in or in front of your fireplace (with triple wall metal stove pipe lining the chimney for safety). If you don't want to make room 3 your new Foyer/Entry ... but if you want the room 2&3 side of the house to be your front of the house ... another way to use the rooms is worth considering: You have a tiny bathroom very close to the kitchen/eating area. Budget permitting, the best use of room three could well be closing it off from room 2 and creating a new full bath in room 3. That would enable you to square the informal dining room and move the bathroom farther away from the kitchen and dining area. Once you've moved the bathroom, you could recreate the space between kitchen and informal dining with a pass thru kitchen cabinet "wall" that you can walk all the way around. https://www.bhg.com/home-improvement/remodeling/architectural-details/home-design-ideas-room-dividers/?slide=slide_2bf3e1c7-021a-4262-9de6-fd5daf3777a7#slide_2bf3e1c7-021a-4262-9de6-fd5daf3777a7 Keeping only one interior door to enter room 2 from room 3 means you could use room 2 as a bonus room -- usable as a bedroom or as you choose. It also means you can keep that one door to room 2 closed and not fully heat it all the time. You could keep as is or alter or (if not load bearing) remove the wall between dining and informal living room to create a single elongated rectangle shaped "great room" -- kitchen, dining, family room. If you created a pony wall between dining wall and informal living, your wood heater in the fireplace could heat the entire great room area. You could keep as many posts as needed for support in that pony wall and, with a solid back on the informal living room room side, you can put any furnishings you choose by it with the back to the pony wall. You could alter the porch beside room 2 between the window to room 2 and the door to room 1 to create a wider porch there that wraps around the side of room 1 several feet. You could even enclose that area and create a new foyer and make the rest of the porch on the right side of room 2 your front porch. Then in that back corner off the kitchen at a right angle to room 3, remove the shallow/narrow open porch and create a square deck or patio there with a rail around it and steps exiting on the left side toward what would be the back of your home. You might also consider a "green wall" -- row of shrubs -- all across the yard so guests are led to the new foyer on the right side of the home.

The room dimensions are 25' X 16', with the wall that has the fireplace being the longest. We are thinking small seating area near fireplace with accent chairs and a sectional couch and entertainment center for tv on wall next to the fireplace.