My picks:
City of God - If for some reason you have never heard of this movie about Brazillian slum kids and drug dealers, and dont mind subtitles, this is a must see.
Election- a totally great darker comedy with Mathew Broderick and Reese Witherspoon that really surprised me when I saw it years ago.
Bernie- Another great dark comedy with an excellent performance by Jack Black. Based on a true story, if you watch it all of the "interviews" with the people in town were actual people from the town where it happened talking about the real incident.
It's a disaster- Great little ensemble comedy about a group of friends stuck together when a quarantine happens. Dont think heavy sci-fi, think about how a bunch of people would act if they knew the world may be ending. This is not that Seth Rogen movie.