Your sectional and rug are fine but then the effect is ruined by the two dark pieces that don't "belong". Could you possibly change the coffee table for one that is glass and metal? It would really open up your room and give a lighter, friendlier ambiance. Try and get one with two levels so the bottom can be used for storing books, which always give more personality to a room. I would put a light blue and beige pillow on your dark chair to give it some relation to the rug and sofa. The wall behind the chair could be used as a gallery wall or try several fairly large and colorful paintings there. Try a large plant or two against that wall also in some beautiful and interesting pots. Instead of the harsh ceiling light have a table lamp and a table with a lamp on it, one by the chair and one by the sectional. Your room will look so much warmer and user friendly.

Lower tv after you purchase a console that is wider than the tv. Remove all the little things filling spaces; little glass table by tv, don't put anything on tv cabinet, remove mirror above couch and replace with art, remove the wicket baskets, the book shelf and candle/lamps on bar. You don't need to fill every spot, you need some "free of stuff" space. Remove pictures behind the lamps, no need for anything there except the lamps. At least get a small round table and forget the bar stools so no one has to look at the kitchen while eating, more pleasant to look at the person you are eating with. It appears as if you have spare chairs to put at the table. No chairs lined on the wall in front of the window, maybe a low bench if needed for seating. You do have to much fur. I love your couch, end tables, lamps and rug. Pick a one or two colors from you rug and see what you find art wise as well as a few pillows. Possibly a tall plant in corner by bar. It appears you have some gray already, the gray appears to go well with the rug and couch. To me the colors in the rug and couch and the touches of gray are calming and cheerful.

Your wood mantle is far too small for the size of that wall. If I were in your shoes (and I have been), I recommend you consider having a much larger surround built.

Is this a family room? If so, I think a large ceiling fan might be useful. Also start with removing the window treatments on the upper windows. If you need light control, get some remote control shades. Keep it all one color.