Jellyfin capable TV box?

[subrezon]

Hey everyone, hope you're all doing well. Just bought my first TV, got a sweet deal on a used 49" 4K Samsung. It's pretty awesome, but has Samsung's own proprietary OS & appstore, which has everything I need, except for Jellyfin.

Now I'm looking for an external device to connect via HDMI, to play back my Jellyfin media collection. I have tried my Raspberry Pi 4, but performance was underwhelming, especially with 4K HEVC stuff.

My requirements are:

• ability to install an official Jellyfin client (obviously), maybe some other apps
  
• enough juice to play back 4K HEVC, AV1 support very welcome but not required
  
• HDMI output, CEC support welcome but not required
  
• HDR support very, very, very welcome
  
• WiFi required for now, built-in Ethernet very welcome (I'll run Ethernet to the room eventually, but definitely not now)
  
• at least one USB port for a TV keyboard, more not really needed
  
• as power efficient as possible (expensive european electricity)
  

Bonus points for:

• enough performance for some emulation (up to PS2) / light 2D gaming
  
• built-in Bluetooth for controllers
  

Don't care about:

• OS - can be Windows, Linux, Android, whatever
  
• YouTube, Netflix, Disney+ etc, the TV itself can do those already
  
• upgradable RAM / storage
  

Should I buy one of those Android TV boxes/sticks, or maybe a mini-PC or thin client with Windows or Linux, or maybe something else entirely? As for availability, I'm in Germany, most things should be available here.

Thanks in advance for all suggestions!