An older b&w film starring a very young Andy Griffith and Walter Matthau ( sp?) titled "A Face in the Crowd". Griffith is totally out of character as a loud mouthed , egomaniac who lets his rise to stardom and the ensuing power that accompanies it go straight to his head and thus his downfall. After getting the notion of the amiable Andy Taylor from his TV show , you do a double take because it is very difficult to envision him as this very despicable character . It is also a good example of how his range of talent truly was as he does a very good job of portraying a villian . Well worth viewing and perhaps a good life lesson .

One of my favorite obscure but great movies is also Scots. It's called "Local Hero" with Tim Matheson and Burt Lancaster.

Another obscure great is: "Le Placard" with Daniel Auteil

Just re-watched "The Road Home" ... A gorgeous portrayal of constancy and devotion ...

Don't know if it's been mentioned, but look up Jimmy Stewarts one and only musical. It's been a long time but I believe it's called pot of gold. I've got it on tape but haven't found it on DVD or better media yet.

Locked stock and 2 smoking barrels it's funny as hell but it's great

I saw "The Man In The Moon" when it came out in 1991. It was Reese Witherspoon's acting debut, and I could tell she would be someone to watch. She played a 14 year old girl in a coming of age movie. Excellent.

I am going to say a lot of Betty Davis movies ...
like ...What Ever Happened to Baby Jane...
and some movie I watch of her's ...
she always seemed mean lol oh darling...
I can hear her say... in her own voice...
such a great great actress ...
and have to go with Gone with the wind too...

...

When You Comin' Back, Red Ryder (1979)

Trailer: https://www.youtube.com/watch?v=TFQC68hr4tk

John Dies at the End is one of my current favorites, from not too long ago (also by Don Coscarelli).

Branded is another really far-out one from 2012, I think. Really makes you think, good for if you're into sociology at all.

Two really great ones that are probably still more or less obscure to standard American audiences are Shaolin Soccer and Kung Fu Hustle. The director is often involved in really great, humorous productions. He starred in some older ones I also managed to find on DVD (don't know if he also directed them, though), like The Royal Tramp and its sequel. If you enjoy a good, hour-and-a-half belly laugh, any or all of those are great choices.