Try http://kat.ph they are the largest public listing I know of and they probably have what you're looking for.
I would say chances are extremely low that any movie (maybe some sort of crowd-sourced production would be an exception) found there would be a considered legal torrent.
The best list I could find quickly,was TF's (from '06) https://torrentfreak.com/legal-torrents-movies-and-videos/