Jake Gyllenhaal and Heath Ledger, "Brokeback Mountain"
2005's cowboy romance film went down in history as one of the most controversial and one of the most-watched films ever. The taboo-at-the-time love story between Heath Ledger and Jake Gyllenhaal was shown onscreen unapologetically and is still one of the most notable films of both actors' careers. It paved the way for more LGBTQ-friendly films.