Threadripper would work fine for gaming, but that processor is not geared toward high performance gaming. It's like trying to make a very heavy truck go very fast when that truck is made to pull a trailer at a decent speed, instead of buying a light weight car with a fast top speed knowing you are not going to be towing the trailer.
Are you going to be towing the trailer? (Rendering, streaming, massive number crunching)
Processors like the 7600k, 7700k, 8600k, 8700k, and pretty much anything running higher clock speeds (4Ghz and up) will get you better gaming performance. The threadripper is more of a workstation type of processor that would be awesome for rendering high-def video or streaming at 1080p, but at what cost to your ingame performance?
I would stick with 6th-8th gen intel K series processors.