I agree with everything said so far. Would suggest you get built in book shelvers on both sides of fireplace, lift tv into a slot it fits perfectly into (make sure you have power on both sides). Then it will disappear more rather than fight with fireplace as focal point. I am always disappointed with mirrors over fireplaces, they become dark, are to high to reflect much. Plus then you have three rectangles fighting for center stage. I'd say very colorful artwork instead. Wonder if you can reorient tv where the big chairs are so both tv and fireplace are addressed? Color, maybe you should decide on furniture first?

A floor plan is helpful.

Hi Are you replacing you kitchen? If so then seek out the services of a decent kitchen designer, either an Independent Kitchen Designer or a designer from a decent Independent Kitchen Specialist then they will be able to look at a design for the whole space you are creating. Good luck with your project. CK

Thanks for all advice, do you mean book cases on wall that leads to dining room. tv unit on long wall looks good any tips on best way to lighten room and how to place furniture and centre room a little. more photos added. I can get new furniture so open to suggestions.