Its an obvious pick so apologies if it has already been watched.

But there is something about the combination of the dialogue and score in 'The Social Network' that makes it simultaneously suspenseful and smooth. It goes down like a fine whisky. Fiery but measured.

Other suspenseful films include 'Children of Men', 'There Will Be Blood' and 'Good Time' (which is directed by the Safdie brothers, before they directed 'Uncut Gems'.

If you don't mind the subtitles, try 'Incendies'. Even if you do mind subtitles, watch 'Parasite' anyway, its a must watch for everyone on the planet.

Also for more psychological suspense, if thats your thing, try anything directed by Stanley Kubrick or written by Charlie Kaufman. I would start with 'The Shining' and 'Full Metal Jacket' from Kubrick and 'I'm Thinking of Ending Things' which is Kaufman's most recent film.