Roku? Where the CEO outright said that they aren’t in the hardware business and they are trying to monetize via ads?
Google? Need I say more
Amazon Fire devices? See above with Google
AppleTV? Sure I have a couple. They aren’t trying to monetize with advertising. But the HN crowd is anti-Apple.
Kodi running on a Pi or some other low power computer is probably HN-friendly, although the usability isn't even close to as good as the Apple TV.
You can also chromecast and airplay pretty smoothly as well.
As far as usability, look at all of the comments mentioning hacks solutions instead of just ordering a commercial product and plugging it in.
I went one step further with my parents. I just bought them a Roku TV and called it a day.