I liked "The Smartest Guys in the Room," too.
There are a lot of good docs out there I'd like to see. In general, I've not seen as many feature length ones as I have PBS series such as "American Experience" and the brilliant Ken Burns docs, any one of which I'd recommend wholeheartedly. I watched his series on the Prohibition not long before I went sober, which wasn't exactly tied to my decision but it did make me think.
I'm history buff. "The Fog of War" -- a profile of Robert McNamara -- is excellent. Also a political junkie ... loved "The War Room" but have to admit I've not heard of "Best of Enemies."