Almost every kind of movie has won Best Picture at some point in the history of the Academy Awards, including a horror movie, if The Silence of the Lambs counts. Still, more dramas have won than anything else, especially those that focus on some kind of historical event or figure, while a decent number of musicals (albeit not a lot) have also won Best Picture.
The following is not focusing on ranking musicals, though. Some of the following movies are musicals, yes, but some are not. They all focus on music as an important part of the story at hand, and so they're music movies, be they musicals, dramas, biopics, or even dramedies. So, Chicago is not here, and neither is My Fair Lady , as they're musicals that aren’t really about music or musicians. Just go with it . Also,