Depends on whether you mean horror or drama. My opinion, and that of most critics is:
The Shawshank Redemption.
* In the 1994 Academy Awards the movie was nominated for seven awards (Best Picture, Best Actor – Morgan Freeman, Best Adapted Screenplay, Best Cinematography, Best Editing, Best Original Score, and Best Sound) but, in the shadow of 1994's big winner Forrest Gump, did not win a single one.
* In 1998 Shawshank was not listed in AFI's 100 Years... 100 Movies, but nine years later (2007), it placed at the 72nd position on the revised list, outranking both Forrest Gump (76th) and Pulp Fiction (94th), the two most critically acclaimed movies from the year of Shawshank's release.
* In 1999, film critic Roger Ebert listed Shawshank on his "Great Movies" list,[8] and in reader polls by the film magazine Empire, the film ranked fifth in 2004 and first in 2006 on the lists for greatest movie of all time.[9][10]
* In 2002, The Shawshank Redemption was voted the third greatest film ever made in Channel 4's 100 Greatest Film Poll.
The Shining made about three times more money in the box office though.