Look for some mid-century modern style pieces - it's a style that has very clean lines and shapes and an airy feel (your eames dining room chairs are mid-century modern). Below are a few options...

W Lounge Chair in Red · More Info

Madison Mid-Century Modern Chair · More Info

Lumisource Rockwell Accent Chair, Teal · More Info

Vail Accent Chair, Orange · More Info

GDF Studio Madeira Buttoned Mid Century Modern Dark Teal Fabric Club Chair, Orange · More Info

Best of Luck,

Melissa, Interior Designer at The Architects

Its definatley tough! Maybe one of these will work?

Both of these mirror the legs on your dining room chairs, which creates a nice cohesive element for your space. The modern silhouette also works well with the great light fixture you have by the couch!

Eiffle Base Paris Wood Arm Chair · More Info

Organic Highback Chair, Cosy Classic Gray, Black Ash · More Info

Not a designer, but I think one chair. You could maybe add 2 poufs/stools in front of window or coffee table? I love your dining table, but the table and candlesticks don't seem to go. I would add a large art piece. And art over sofa. You could go any color direction in living room!

nnn - Polyvore · More Info

vv - Polyvore · More Info

I would get a larger rug. The one there now is only going to make the room look smaller. Have it be at least 1 foot wider than the sofa and put the front 1/3 of the sofa on the rug. 1 chair to start to see how that will work. I would get a swivel chair so that it can face to sofa for conversation or the TV for watching. I would get white panels for the window. Hang the rod up at the ceiling and have them just touch the floor. Remove the mirror, it is too high and only reflects the TV. Put art in its place. Move the floor lamp as it's cramped in that corner, get a narrow end table & lamp for that space. Pull the coffee table closer to sofa (18" away).

WHY IS THIS POST SHOWING ON THE LANDSCAPE DESIGN FORUM??? It has NOTHING to do with landscaping!!!!

HOUZZ - pay attention!! You need to correct this issue. It is messing up this forum

I would move the tv to the wall the couch is on and then move the couch facing the tv with the walkway from the door behind it. Add one smaller scale chair facing the window. This will create a entryway and get the traffic flow issues corrected.

BTA. A new rug that is a bit bigger and not the same color as the floor would help define the space better as well.

Look on mid century furniture. They feel good to see and very comfortable while we are sitting. To share my experience I got a year ago as Womb chair. It is very modern elegant look in my living room.

I'm very happy with my deal and purchase. I got it from Barcelona designs.

You can have a look at their store

https://www.houzz.com/products/womb-lounge-chair-and-ottoman-2-piece-set-light-gray-prvw-vr~42324526

Something fresh and interesting like a dwarf pomegranate or mango tree could look great there!