Here is the stack I recommend:
* Radarr (movies) with optional second instance for 4K versions
* Sonarr (shows) with optional second instance for 4K versions
* Sonarr (anime), separate instance to have control over quality settings
* Prowlarr (tracker/indexer management)
* SABnzbd (Usenet)
* qBittorrent (torrents)
I would also recommend consulting the TRaSH guide to tune your setup and ensure you’re grabbing quality releases. From there, the next logical step is Profilarr :)