'My Best Fiend' (1999)
Who else but Herzog could have crafted such a wonderfully affectionate, totally backhanded valentine to the actor that gave him those memorably unhinged performances – and nearly killed him, figuratively and otherwise? This tribute to lifelong collaborator/frenemy Klaus Kinski doesn't just explore their tempestuous relationship; it also delves into the star's need for chaos to get his creative juices flowing. (That one-man-show footage is both hilarious and absolutely terrifying.) You will not find a better personal/professional unpacking of this fire-and-ice duo.