Need a good mystery thriller movie/show/documentary

Are you after mysteries *and/or* thrillers based on true stories/events? Or strictly documentaries *about* thrilling *and/or* mysterious events? Or somewhere in the middle? Open to sci-fi/horror, or want them firmly grounded in reality? Preferred language? Okay with subtitles?

A couple favorites that are both thrillers *and* mysteries until I get more specifics:

Exhuma (2024)
The Innocents (2021)
The Outsider (2020) - seconding
The Wolf of Snow Hollow (2020)

Under the bridge.

Cobweb 2023
Nefarious 2023
Knuckleball 2018
Ghost of war 2020
Significant other 2022
Glorious 2022
Disappearance at Clifton hill 2019
Sightless 2020
Through the glass darkly 2020
Caveat 2020
See for me 2021
Spiral 2019
Kimi 2022
Girl 2020
The visitor 2022
Hideout 2021
Good neighbors 2010
Chasing sleep 2000
H8RZ 2018

The Terminal List (2022)

Don't Worry Darling (2022)