More than ten, and in no particular order:
There Will Be Blood
The Dark Knight
WALL-E
City of God (Brazil)
Eternal Sunshine of the Spotless Mind
The Wrestler
Pan's Labyrinth (Spain)
Kingdom of Heaven (Director's Cut; the theatrical version is a hunk of shit)
Downfall (Germany)
Children of Men
Untitled (the Director's Cut of Almost Famous)
Into the Wild
The Lives of Others (Germany)
Let the Right One In (Sweden)
--edit--
Added one:
Kiss Kiss Bang Bang