I love the art of film, be in blockbusters, indie movies or international. I've limiting this to just your top 4, any more and the best becomes too excessive,....but obviously you can list more if you have the time.
For me, personally it was:
1. Contact (1997)
2. Into the Wild (2007)
3. Rear Window (1954)
4. Cloud Atlas (2012)
5. Life is Beautiful (1997)
There honestly countless others that have moved me....I've just chose those that I think had the biggest impact on me mentally.
Another one that was amazing that i recently saw was Hit the Road: India (just stunning!)
https://vimeo.com/ondemand/3359