Id look into plex_debrid as well. Might not fit your use case, but it’s been great for me. It allows you to use a plex watchlist or overseer to search for movies, and torrents are found and added to your debrid. It can get multiple versions (1080p, 4k).

Mostly I use it because of the skip intro button I get from it, so might just be unnecessary overhead for others

Pretty sure AllDebrid (RealDebrid competitor) offers a 7 day free trial, might be worth a look

I’ve found almost no movies that have a 4k version I haven’t been able to get through the few most popular public trackers (133x, bitsearch etc). Atmos can be trickier, but I’ve consistently been able to find them. Dolby vision has almost always been available when applicable.