Overseer makes recommendations according your plex/jellyfin views, but don’t know if it is better than trakt (don’t know trakt well…) Prowlarr is to manage indexer centralised for all the arr services. It is as well a good tool to search releases manually, if the arr services fail to grab a release you want.
I only use old PC hardware (mostly apple) that friends and family give me for free 😂 Linux is great