6th gen works, 8th gen and up works better.
As long as you have enough RAM, you won't get much more speed. 4GB should be enough. A minimal Linux install plus Jellyfin takes less than 16GB on disk, and anything is fast enough.
Fanless Intel runs a little hot for my taste, but it's your build. I've run tiny/mini/micro systems that were virtually silent but still had a CPU fan to help move heat out.