I use much of the servarr set for core functionality. Radarr for movies, Sonarr for TV show, Bazarr for subtitles, Prowlarr for indexing. Those are the management tools for the media. If I want to delete something off the HTPC, I delete it from Radarr/Sonarr and let them handle cleanup of the library.
Qbittorrent does the downloading, and the free version of Serviio handles DLNA streaming to display devices. All I want is software that streams to display devices while handling transcoding if needed, and Serviio does that. I've tried Plex and Jellyfin in the past, but I felt like they both attempted to do more than I needed while actually accomplishing less than I wanted. It's been a while since I tried either of those though, so things might be different now.
All of this is running in an old HTPC case containing the parts from the prior incarnation of my gaming PC, plus half a dozen 4TB hard drives. It's wildly over-specced for what I ask it to do, which has given me plenty of headroom to play around with self-hosting stuff like ViewTube and SearXNG.