OK, I have no idea if these are available on Netflix, but here are some of my favorite, "unknown" films.
The Devils
Oliver Reed, Vanessa Redgrave, directed by Kurt Russell 'nuf said.
The Haunting The 1963 version,
not the remake. IMHO, the finest horror movie ever made.
Memento A brilliantly twisted little movie. One of Christopher Nolan's early works. (oh and if you haven't seen
Inception yet, get it).
The Prestige is another good Nolan flick and
The Illusionist is a similar "magic" related flick.
Two other good Edward Norton flicks would be
Roundersand
The Score
I would say it goes without saying that anything by
Kubrick or
Hitchcock
should be put on the list. If you haven't seen the latter's "
Rope" it's a very nice film.
If you want to venture into TV series, there are two that I would strongly recommend.
Babylon 5 is, IMHO, the finest Sci-Fi ever done, TV or movies.
If you've never seen it, you
MUST watch at least the first four seasons.
IN ORDER!
Season 5 was a bit off because the creator thought it was going to be cancelled after season 4 and then suddenly had to "fill" the last season with stuff he hadn't originally intended.
B5 was a bit of an anomaly in that the creator had all five seasons mapped out before the pilot was shot. Things and characters that were minor side bits in season 1 became major plot lines in later seasons.
Firefly is yet another example of how stupid TV execs can be. It didn't even last a full season on Fox, yet it garnered enough support to justify them making a full length movie "
Serenity".
Joss Whedon is the guy behind it. He also did Buffy the Vampire Slayer (the TV series) and Angel. He's someone that I will watch his stuff regardless of what it is.