For a TV that can be set up as a 'dumb tv' and you can even reject the terms and conditions: Hisense surprisingly.
My partner got one a month ago and it was stupid simple to set up and asks you if you want to set up as a Smart TV or as a Basic TV.
Also ditch the Roku, that's absolutely just as bad as using the onboard smart tv functions. Theres NVidia Shield, Apple TV, or with a little setup a Raspberry Pi running Kodi.
Pour overs are very forgiving and will give a decent result if your new or just eyeballing measurements but also if you want it exactly like you like it you'll use a scale.
Fedora IMO is pretty forgiving and if I want my Fedora install exactly how I like, I'll follow the same steps as always when configuring and setting up.
Just like a pour over/chemex.