Boyhood
Filmed over a period of twelve years, Boyhood is Richard Linklater's attempt at organically capturing a young boy's ascent to manhood. The script was conceptualized as the movie was made, working off basic plot points. Boyhood won a number of awards, including Patricia Arquette's Oscar for Best Actress in a Supporting Role.
All the President's Men
This classic Robert Redford and Dustin Hoffman film wove a narrative around the infamous Watergate scandal. President Nixon's term was slated with a number of other scandals, but thanks to reporters Bob Woodward (Redford) and Carl Bernstein (Hoffman), Watergate was the defining moment of Nixon's time in office. The film was preserved in the Library of Congress in 2010.