The next Met Gala fashion exhibit will be devoted to a designer famed for both his singular talent and the scandal that lost him one of the top posts in all of fashion: John Galliano. The British designer was creative director at Christian Dior for nearly 15 years, the very pinnacle of the fashion world, before he made a series of antisemitic and racist comments in 2010 and 2011 that went viral, leading to his conviction in an antisemitism trial. Dropped by Dior, he spent several years involved in public and private efforts to rehabilitate. He made a comeback in 2014 when he was hired by Paris fashion house Maison Margiela, where he…