I am having the same difficulty. I would like to put the fireplace in a corner (I personally don't like having the TV off to the side on the same wall. In theory I would like it on a corner, but my room is all windows on one side, an a straight wall that joins a hallway so I'm not sure how that would would. As for it being too high, my current plan is to get a very comtemporary low fireplace. Currently we have a similar set up and while the TV is a bit higher than I like it (maybe 6 or 8 inches) with it tilted downwards it has never felt uncomfortable. Some inspiration pics: I'd prefer this without the inset TV as you never know what size you may buy in the future. [contemporary family room design[(https://www.houzz.com/photos/contemporary-family-room-ideas-phbr1-bp~t_720~s_2103) by chicago interior designer Michael Abrams Limited The below option could be made much lower. I like the fireplace closer to the floor! [contemporary entry design[(https://www.houzz.com/photos/contemporary-entryway-ideas-phbr1-bp~t_741~s_2103) by vancouver general contractor Klondike Contracting This one doesn't have a TV, but you can see that it is low enough that it would end up at the right height. [modern living room design[(https://www.houzz.com/photos/modern-living-room-ideas-phbr1-bp~t_718~s_2105) by new york architect Chelsea Atelier Architect, PC

Another consideration is convenient seating directed toward tv viewing..close enough ..and with tv mounted low enough to view without having to lay “back” and lookup...to view...sometimes a challenge in a big...tall room...never mind when there are multiple windows allowing a lot of sun shining in your eyes for daytime viewing

I remove that mantel first thing. It is an add one and it doesn't fit, doesn't belong...seller must have thought it was "staging". Without it, you are able to design the abutting walls. Shelves mean adding things. I am not good at that...it looks easy when you see examples of odds and ends looking great, but it takes some doing and some money to make it work well. What about art, instead?

I think the mirror you love looks too heavy for that space. Could it be used in your entry? I like this mirror with a slim frame and arch that echos your entry on the right. How about an artful display of books in colors that complement your brown brick? A bit of black on the mantel decor will serve to tie it into the black TV and firebox.