Every TV is ad-free if you don't give it internet access.
> Some TVs with ads actually have ads pre-loaded on them, so not connecting them isn't sufficient to defeat the ads.
It’s pretty much a TV + a set top box these days if you want to avoid ads in day to day use with most brands now.
I think out of the major brands only Sony hasn’t been pushing ads so far at least as far as their premium models go.