Most of my textbooks about feature story writing recommend this story about actor Michael Clarke Duncan as a great example of a feature story.
http://archives.cnn.com/1999/SHOWBIZ/Movies/12/10/greenmile.duncan/
Also, you might want to read this profile about John Grisham… it’s a little less dated, but not as good.
http://www.cnn.com/2008/SHOWBIZ/books/02/15/books.johngrisham.ap/index.html