You have a wonderful home. Lots to work with. I'm not much good at this but I do see a plan. It is possible that someone else has suggested this and if that is the case then I am in agreement with whomever it was.(I get confused with all reading, I am a hands-on kinda person) I like the couch in front of the fireplace, placed at the same angle. I was wondering if there was room to offset the couch away from the carpet, and place the armoire in the corner. Is there enough room to place the loveseat in front of the armoire? The armoire is very visually heavy and if it can be placed in the corner it will balance out with the light coming in from the window. I was also picturing the mirror over the fireplace with a red painted frame. If the armoire doesn't have room to be placed in the corner and has to be placed somewhere else where it still looks heavy, you could put a large oblong fairly low white container and place somekind of white arrangement with a trailing white plant that would bring your eye back into the room towards the fireplace. I don't know if this will help or if it works in decorating. When I was in photography, a rule I was taught to read a composed picture. You would look a picture and read it from left to right, just like you would read a book. Anything that is/was placed in the upper right hand corner would create tension and that is where your eyes would go. That wasn't always a good thing because it would take you away from the "focal point". Since you can only view the fireplace room from one direction, I hope this may help. Have fun, don't stress. Oh and as for the oak. I have natural pine and I have found that the darker, grayish shades of paint seem to look the best. Since green is in the family of the complement to orange, I would stay away from green for paint. It will only make your oak trim stand out more.

I agree with Thalia B above that wood trim is making a comeback but I'm seeing slightly different tones in those inspo pics than the one in OP's pic. (For as much as we can trust screen renderings of colours.) Subtle difference but it can make a difference. I love wood trim as well and when I said I'd lighten or darken this trim, I didn't necessarily mean painting it. Also, @jwencel42, to be clear about the fireplace: it's not that it's meh for me; it's that the view is superlative. :) In this room's design, how can one not privilege the natural view that take one's breath away?! :D This view deserves attention and contemplation and 'bringing the outdoors in' usually makes for harmonious design. A well-designed room is one that makes you feel good living in it so function is key. Focal points can only go so far. :) And usually, once people are in a room, they become the focal point.

Is this a rental? All of your inspiration pics feature white white walls. Start there. You don’t really give a budget, but shop for a white, washable sofa with a low profile then move on the chairs. Keep an eye out for a piece of art you love. Above all, be patient and keep looking until you LOVE each piece!

I was going to say to use dark navy blue as the accent color but I saw the wall next to it is already that color.  You could do a large canvas art or a group of them under the window, a mirror to the left in that vertical part. Or create the look of a bigger window by using mirror squares under the window. Carry it down to match the other window's bottom. If you want a vertical mirror, a leaning one like this one would fit nicely. Same one I have in my bedroom