Recently become a fan of kickasstorrents, they usually have a x265 version with a bunch of blu-ray extras and Prowlarr already knows who they are.

Is therarbg safe? The original rarbg closed one or two years ago.

Also, don't forget torrent private trackers. They're harder to get in (signups are usually closed, or you need an invite from someone who's already in), but they're very good!

Lots of hight quality content, well organized, usually with many seeds.

Of course you need to follow their rules and seed enough.

Usenet is also a surprisingly good way to find content, but you'll need to pay both an indexer and a server.