Wiki article: https://en.wikipedia.org/wiki/All_the_President’s_Men_(film)

Despite 3 Days of the Condor being one of my favorite films, I never got around to watching All The President’s Men until a couple days ago.
My god, what I’ve been missing.
It’s truly a masterclass in film making. It’s a slow burn, but never feels it. There’s always something interesting happening, some new piece of information revealed, tension always building, and acting so damned good I didn’t move from the sofa until the end.
There’s some really impressive cinematography in this, but something that consistently impressed me was the level of acting of even minor or unnamed side characters, who do virtually as good of a job as the leads in feeling absolutely believable and natural.
If, like me, you just haven’t gotten around to this film, I really recommend making it your next watch.

What is the Paranoia Trilogy?
All The Presidents Men has been my favourite movie for ages, and I have watched it countless times, although I am beginning to enjoy it less precisely because of the reasons you mention feeling as well: It is an ideal which once existed but is now completely gone, even though we need it more than ever. But I have not heard about a Paranoia Trilogy before.
It’s Pakula’s three movies in the 70s that all had the theme of political paranoia. I mentioned them in my previous comment and they’re all definitely worth a watch.
Klute (1971)
The Parallax View (1974)
All the President’s Men (1976)
Here’s an article about them as a group
https://screenrant.com/forgotten-movies-1970s-paranoia-trilogy-modern-relevance-humanity-politics/