I bought a Samsung 85 inch Q9 series about two years ago and it has been great. I know there are many different Samsung models and the picture quality changes with each one.
Best Buy had them on sale last week for $1,000 less than I paid but that is the way it is with TV's. That sale is still going on. They also have a 100 inch Hisense but you would really need the right room for that. The Hisense is $2,999 marked down from $9,999.
https://www.bestbuy.com/site/hisense...?skuId=6561416
Last year I mounted two televisions on stone fireplaces and it really wasn't that hard. The right drill bits and concrete anchors. I used telescoping articulating mounts but the TV's seem to just stay in one place, we don't move them.