I know android TV and Roku have jellyfin apps. But I would stay far away from LGs WebOS, and I haven’t heard of Tizen.

Id honestly buy w/e tv you think looks the best quality wise, then add a media player. For ease of use Nvidia shields are fantastic and run android TV, and work wonders with steam link.

What I did was a Sony OLED which has android TV and is fast enough to use streaming apps with little annoyance. And then I bought an odroid n2+ and installed coreELEC to use Kodi to stream media locally without needing to transcode. Then use jellyfin for if I want to stream outside the house.

Sadly my setup doesn’t have a solid Steam Link option, as the Sony TV isn’t powerful enough and there’s a delay in controller input and what you see on TV.

^ Hopefully some good ideas for you ^