For the FBI it began with J. Edgar Hoover; for the CIA it began with Stansfield Turner.
So then Richard Helms, Allen Dulles, James Jesus Angleton and William J Casey were probably the last of the “good guys” at CIA.
Source: National Public Radio, by Scott Neuman
Question is, who all replaced them.
How to take down the FBI:
Refuse to talk to an FBI agent. Even if they claim to be hot on the trail of the next Bin Laden. Don’t expose yourself to a process crime. And if seated on a jury where any of the evidence passed thru FBI hands, you must vote to acquit.
If they can’t conduct investigations, and can’t get convictions, they’ll just wither away.
How to take down the CIA/NSA:
Flood the zone with potentially disturbing terror/espionage signals in every email, phone call, social media posting or other communication you engage in. Flood the zone with more leads to more bad stuff than they can ever keep up with. Sooner or later the whole Rube Goldberg contraption will collapse under the weight.