Not that many, surprisingly. At least not major ones.
F. W. Taylor. Guy was OCD crackpot, and invented Time-and-Motion humans.
Anna Freud: see Adam Curtis doc (Papa Freud had weird theories but not for diff reason)
I can think of a couple of living ones I won’t mention... twitter.com/yeyoza/status/
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Designing Time and Motion studies in my undergrad was pretty depressing :(

