We bought a new tv two years ago and I spent probably a week researching to find the least-smart set I could.

The best option is display only units made for businesses, like what they use for restaurant menus, but those are usually twice the price of normal tvs because they're not app subsidized like smart tvs are.

What I ended up going with was Hisense. They ship with Google TV, but it's disabled by default. On first power up, it asks if you want to activate the Google TV features, and you can just say no. The thing then runs like a basic display.