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.
Instead of a TV set, I use a very big monitor, which is connected to a mini-PC (an old Intel NUC with Linux), which also has a TV tuner and an infrared remote control receiver. Besides just showing a TV channel, a mini-PC can also record it and it can play any other kind of movie or music files, or it can stream some video from the Internet.
BTW corporate meeting rooms with smart TVs...shouldn't have them.
But this response is like when there were meat safety issues in the US and some people said "then buy another brand". People didn't buy that argument (for what I hope are obvious reasons), and so regulation was enacted to protect the public.
It's clear that this problem must be handled with regulation, too. I'm all for markets solving problems, but I'm also for recognizing when it can't. I haven't seen the whole video yet, but I have a sneaking suspicion that it's NOT just LG.