Secure Smartbox for TV

Hey, looking for a smart box to bring back the smart stuff on my LG tv and so I can disconnect it from wifi.
Will mainly use it for watching twitch (that the LG no longer supports) and netflix.
Would like to avoid a box that sells my info forwards "LG & Samsung Smart TVs take snapshots of what you watch multiple times per second" etc. hence a preference for one without a mic, no need for audio controls any way.

Is android box a doomed idea to begin with looking at things from this perspective? I dont need to put the full tinfoil hat on, but the less things being in the wifi that dont need a wifi the better.