I don’t download lots, so still mostly manually browse for stuff. I suffer from hearing loss, so need subtitles for everything. The best indexer for me is Drunkenslug for 2 reasons.
Firstly each release has a "media" link which pops-over the video info plus the audio language and subtitle language. Secondly DS has a "New Releases" link that lists movies by date, genre, etc, have found some good stuff I’d not heard about before.
I also use DogNZB which has a useful watchlist feature which can setup future movie and tv releases for auto RSS download whenever they appear. They have lists of upcoming movies and shows. That’s a bit like Sonarr, but only for that one indexer.