The following is not a best of list is just a list of movies I watched and I still remember them because they made a strong impression on me for some reason.

Adam's Apples Denmark 2005
Alexandra Russia 2007
Dogtooth Greece 2010
Hawaii, Oslo Norway 2004
The White Ribbon Germany 2009
The Lives Of Others Germany 2006
Downfall Germany 2006
The Experiment Germany 2001
The Island Russia 2006
Plato's Academy Greece 2009
Strella Greece 2009
How To Get Rid Of Others Denmark 2004
4 Months, 3 Weeks & 2 Days Romania 2007
The Sea Inside Spain 2004
This Is England England 2006
Summer Book Turkey 2008

Not to forget it's just my opinion and not a gospel