Philip Seymour Hoffman played a number of gay or bisexual roles over the course of his career, to the point where people who weren't familiar with his personal life actually thought he was gay. In reality, he was in a committed relationship with Mimi O'Donnell from 1999 all the way through to his tragic death in 2014.
Of all the gay roles that Hoffman played, the one he received the most attention and credit for was 'Capote,' the Truman Capote biopic which hit cinemas in 2005 and won him an Oscar. The movie captures Capote at a pivotal moment in his life, drawn into a grim fascination with the murders of Perry Smith. He turns Smith's story into the book 'In Cold Blood' but is traumatized by Smith's execution and never writes again. Hoffman's performance captures Capote's sorrow and torment perfectly.