An example I learned of recently is Smedley Butler. Super decorated military careerist, but once he got out, he wrote War is a Racket and called out the corporate profiteers directly. The man basically singlehandedly foiled an attempt to coup the US government and prevented fascism from corporations like JP Morgan, City National Bank (Citibank), General Motors, Goodyear, Standard Oil, and more. Congress investigated and confirmed there was a coup planned and they would have acted. And since these companies don't exist anymore, we can see that they were prosecuted and held accountable.

Oh wait, that's right, they slandered Butler, called the whole thing a hoax and paid off the papers and members of congress to run the stories so that no one faced accountability.