It's easy to recall the three films from 1995—"Braveheart," "Rob Roy," and "First Knight"—but “Tristan + Isolde” surpasses them all, or at least measures up favorably. The movie shares a storyline with "First Knight," involving the king’s confidant having an affair with his young wife, yet it's simply better overall. James Franco portrays the melancholy Tristan, who has ample reason to be gloomy, except when he fi…