PiHole - For blocking ads. (Everyone should have one of these)
OpenMediaVault - For NAS
Portainers - For loading docker containers
Radarr - Downloading Movies
Sonarr - Downloading TV Shows
Tautulli - Monitors my plex server
Overseer - Allows members of my plex share to request content.
NZBGET and Real-Debrid Torrent Downloader Clients - For downloading content from usenet or real-debrid.
I have one Pi4 running all of these as docker containers. Have fun!