It looks like the best thing is to start with a new 3 seat sofa. Since you have the TV above the mantle, we assume you want your seating positioned that way. Then you will want two chairs to go on the wall directly across from the slider. You also may like a rug? Below you can get a lot of great ideas from designs of ours. Note the furniture, rugs, end tables, pillows, lamps, artwork, window treatments, coffee tables, and various other decor accessories.

Thank you all for your feedback! @groveraxle I want to keep the couch and furniture arrangement as is and keep the TV above the fireplace. I don't have an outlet to put it on the other wall and I like it this way since it is open to my kitchen and in person it makes the rooms flow rather than cutting it off by having the back of the couch facing the kitchen. I agree with your comment on the vertical sticks and it feeling too skinny..that's sort of what I was getting at in my question with adding more to the room and making it feel more full. The picture with that new coffee table helps a lot! Maybe I should shop for new coffee and end table? Eventually I plan to replace the two chairs with cream colored arm chairs or wingback style chairs. Any other suggestions or help would be so appreciated! Thank you.

First thought is to move the whole seating area down toward the fireplace so the the end table is centered on the far window. My moving the seating area down, you may be able to have a sofa table behind for some lamps. I would look at plantation shutters although if I could convince you I’d go with drapes too. It will help to balance that wall out and add some softness as well as add some visual ‘pop’ if you chose a pattern. With that said, with drapes you wouldn’t need any artwork because the wall space would be taken up by the drapes. I’d remove the mirrored piece to the right by the entry as it looks like it’s floating out in space. I would also consider doing something else other than artwork. There is so much out there like wall planters, metal art, something 3-dimensional. Just an FYI, there are apps like BeCasso that will take an existing photo and turn it into a watercolor, oil paining, pop art. Then you can order it as print, canvas or whatever. I did some mediocre mock-ups so you can get a feel for what some of this would look like. I also included a pic of a house like yours so that you may want to put something in the entry. I wouldn’t two two items just one.

Good layout and wonderful color sofa! Looks like you are not afraid of color, go for a colorful rug and walls. Rug 9x12 Colorful or light off white Sounds like this is your tv room. Consider a darker more dramatic wall to compliment the color of the sectional and vibrant lounge chairs. Keep the fireplace wall white and the ceiling white (Benjamin Moore Decorators White - a clear bright white) as it will bring out the color of the sofa. The light walls behind the sofa are washing out the color. Here are some inspiration pics. ^ ^ ^ BTW this is wallpaper ^ ^ ^ The color of the wall is the color of your sofa. Note the bright turquoise color on the sofa to consider for the wall color ^ ^ ^ It's all about cozy comfort. Note the colorful rug ^ ^ ^ Note the wall color (your sofa) and the blue green art (for the walls) Light floor and bright yellow accents ^ ^ ^ I wanted you to see the brown tone on tone and the light side wall and light rug. If you do a tone on tone with the blue colors you can achieve this layering. ^ ^ ^ Again the tone on tone color with hot pink accents.