The 55" LG I purchased at Costco for less than $400 a couple of years ago works great and I've never connected it to the internet.
[edit] looked it up, it's this one: https://www.lg.com/us/tvs/lg-55UM7300AUE-4k-uhd-tv
Of course, who knows if they've since updated the OS and make it impossible to use without establishing a network connection..