You can put the TV over the fireplace, not the best situation but the way the room lays out it is the only logical place to put it. If you could you should add one additional layer on your mantel that could extend it out another 4" to deflect the radiant coming from the fireplace. I would also mount it on a slimline mounting bracket and have the bottom of the TV no further than 4" above the mantle. Ideally you want the TV to be in as straight a line as possible with your eyes. You don't want to look up too high at the TV, it's like being at a sports bar. Also if you can snake up the power and the HDMI from the cable there is a box they make that has both in one so it makes for a very clean installation.

The ghost chairs are AMAZING! Very strong and stable. It brings a a lot of space for a small room and the loui style are very classy. Ok I will buy the table, it's goof price and I totally love it. I am living in a construction camp at the moment! Everything is a mess but I hope everything will look beautiful when the renovation finishes. I have just moved in with my partner, the typical manly man and I am the typical burly so it's hard to compromise in colours and styles! Plus there aren't many cost effective options in NZ so decorating is basically a mission!

And the seating areas are different, don't try to make it look like one area. I would put minimal ( if any) teal around the black sofa. Do your dining room. Then give you living room the same respect, it is it's own space

Also take a look at Room and Board....they have several tables with different wood finishes or wood/steel/metal bases and a good selection of various tabletop materials. Also if you prefer a wood table, an area rug underneath the table could also help to break up all of the wood too.