LibreELEC takes the win for me almost every time. Extremely efficient. Kodi has the bare minimum but there's an add-on for your niche needs & Article Fuse 3 is insanely polished now & hands down THE best Kodi skin ever.

I run the official Jellyfin add-on for TV + series but still have Elementum for p2p streaming & I could also use Jellyfin's music library but Kodi can just access the shared Navidrome root folder. I prefer multiple ways of accessing the same folders than leaving it all to Kodi or Jellyfin.

But I digress. LibreELEC can be the powerhouse you want or the barebones you need.