I don't think there are any major American Companies that you could make that type of film about. All companies have good and bad people in them. The key is strong leadership, Bob Iger and most of the higher-ups seems content to let the various divisions run themselves (for better or worse) thus you have the current mess. You can't have the CEO micro-manage but strong leadership and vision is key rather than the current situation with the various divisions constantly putting out inconsistent information and inconsistent quality while Iger mindlessly adds new elements to an empire that can barely manage it's foundations and collects the big bonuses.
I would much rather have a hands-on CEO than a Teflon manager like Disney has now.