I've nominated the CHERUB series by Robert Muchumore which has a whole lot of CoC and also is generally awesome. (Canon gay characters! In a YA series aimed at boys! Characters BEING racist or homophobic or sexist and getting called on it loudly!) Off the top of my head (and okay, wiki helped) there's Kerry Chang (one of the main characters), Shakeel Dajani, Michael Hendry, Gabrielle O'Brien and Fahim Bin Hassam. And it's awesome and there are kiddy spies and ethics commitees and I would love more fic for it.