The Roy Krock movie worked because audiences understand McDonalds. Trying to explain the relationship between R&D policy and defense spending is much tougher. Although see Heinlein's "Destination Moon".
Certainly when it comes to WWII era technocratic bureaucrat-administrator types I'd be more interested in, say, a film about the National Recovery Administration's first Director Hugh S. Johnson, who was a bit of a crank and flame-out and perhaps had extremist views of modern day political salience. (I don't think he had anything to do with the alleged Business Plot, but a movie can easily evoke it and hey, Smedley Butler appearance as a character.)
But yeah, a movie about an administrator who was simply competent and important in an abstract systems-based way without personal drama or controversy does seem somewhat difficult to turn into a full-fledged biopic. Maybe a PBS mini-series?
Seems easy enough to add in some personal drama and controversy and some science details about the system they're in charge of in order to make it a fully-fleged biopic. Writers have been embellishing stories since before there's been television.