It might be worth checking out these episodes of
The Outer Limits:
https://movieweb.com/the-outer-limits-episodes-scariest/
An episode I remember liking was "The Architects for Fear," where a group of scientists drew lots to become the one surgically altered to be an alien invader to unite the earth. It was on this list (and the one above):
https://houseofgeekery.com/2019/07/23/the-outer-limits-top-10-episodes/