The one about Loaded and lad mag culture in the 90s is pretty good.
This sounds unlikely, maybe, but Gods of Snooker and Gods of Tennis. The snooker one especially is full of jaw-dropping 80s telly footage (players having a fag and a snifter while the other guy takes his turn, all the ads round the room being for booze and fags etc). Both of them talk to everyone: players, managers, promoters, journalists etc. Even if you don't think you're that into the subject matter, you will find them interesting.
Summer of Soul. Footage of a series of summer concerts in Harlem, over the same period as Woodstock (which got all the attention). They also talk to people who were there and show them the footage. Some are in tears as they see on film this event that, going by the media at the time, you wouldn't know happened. But it's also just a great, great music doc: Mavis Staples, Mahalia Jackson, BB King, a young Stevie Wonder, Sly and the Family Stone, a young Nina Simone (who is FEROCIOUS), Gladys Knight and the Pips…
Nostalgia for the Light. Filmed around the Atacama desert and the observatory there. It's about both the astronomers working on the night sky/space, and people whose loved ones were disappeared and likely dumped in the area in the Pinochet years. It is astonishing. I saw it at the cinema, so a good ten years ago if not more, but it has stayed with me.