I think fine tuning the layout a little more will help you zero in on decor. The bookcase and chest behind the love seat look like leftover furniture that need a home rather than thoughtfully placed. I'm assuming you like the love seat off the wall so you can see the TV, if so, consider placing a sofa table behind it with a pair of lamps on top, then artwork above it and a tall plant in the corner by the window. Do you have another similar sized chair you could place by the fireplace to make that a grouping? This is your final paint choice, correct? Just want to clarify that it won't be changing.

You definitely need a couple of side tables and lamps. The lamps and shades will provide visual relief from all the horizontal lines in the room and add much-needed people level light.

I would also add a basket or tray to your coffee table to add texture and break up all the brown.

Beverly - what is that on the wall ? Painting ? Shelves ?

I can get a new smaller side table too

The fireplace looks lonely. Could the TV go on the wall next to the fireplace, which is what I think Bev has done. Then you have both your focal points together, which IMO looks better, as it is now things look scattered.

The tv looks kind of high.

Can all the couch pillows go? Very light-colored pillows would help a lot.

In one of the pictures, the brown leather-ish chair looks so far away as to be a ‘timeout chair.’

You can use your existing cabinet but the TV has to be lowered.

Might not be enough room for the chair. Can't tell for sure without measurements.