There have never been more important metal filmmakers than Bruce Sinofsky and Joe Berlinger. Sure, McFadyen and Dunn are more metal, and Christopher Guest's one-off is in a class by itself. But no films nailed the substance of metal and metal culture more than Sinofsky and Berlinger's Some Kind of Monster and Paradise Lost trilogy.
People throw around praise about movies saving lives all the time, but Sinofsky and Berlinger's films did just that, casting a light on people and issues that were being ignored or vilified and changing them for the better. They kept the greatest metal band in the world together and kicked off arguably the most significant cultural movement in metal's past twenty years, leading to the exoneration of the West Memphis Three. Thank you for your work, Bruce Sinofsky, and for being a leading example of how great art can change the world for the better.