Is it a light room? North or south facing? And will it be mostly used in the day or for evening TV?
Our living room is used mostly for TV at night so it is cosy. I have smoky amethyst wallpaper (almost plain, just a slight texture), a pale grey carpet, one toffee coloured sofa and one cloudy blue, grey Ikea Hemnes TV unit, and pale grey and black accents in pictures, cushions etc. The tan sofa brings a bit of warmth. Lighting is low, via table lamps and 2 wall lights with low wattage lamps in. Curtains are stone coloured.
None of this may work for you however! Depends on how you're going to use the room. With the elements you list, all of which are pretty neutral, you can do almost anything. Which I appreciate isn't much help....
My lounge is very long and has huge great windows down one side overlooking the trees in the garden. I have 2 deep burgundy walls, (the 2 end walls) and 2 sandstone walls. I have a black wallpaper with spooky trees to go the chimney breast wall. I have black chandeliers and dark wood furniture with 2 burgundy sofas, with a woodburner and a mahogony fireplace. It's my goth-inspired room (think Merlin medieval type goth rather than emo type goth) I have a green carpet but really want wooden floorboards and I love the curtains in the palace on Merlin- they would just fit in so well.