The White Savior complex throughout movie history
http://spectrummagazine.org/review/2009/12/07/hollywoods-white-savior- complex
You can find more here.
http://www.jstor.org/pss/10.1525/si.2010.33.3.475
Conrack, Amistad, Freedom Writers, Half Nelson, Glory, Music of the Heart, Dangerous Minds, etc.
What would you add?