Yeah running no SMT would be the go if gaming. Even then, games don't use near enough cores for there to be many gains. Whichever chip has the higher clocks will win after a certain core count. I think it's the extra cache that makes the difference as you move up the core stack.
12 cores is silly for gaming till we have something twice as good as the 2080Ti, so 16 cores is laughable really. Good bragging rights though, to game with CPU usage at 20%. I think another year or so of game development until my 6 core chip will start to feel the pinch. On paper anyway, assuming coupled with a 2080Ti, anything less than that and GPU will still be the bottleneck.