Death Note may have gotten incredibly silly at times, but at least it got us some top-tier memes.

Well, pretty much everyone in the first season of Promised Neverland is good at mind games, regardless of their role in the story. (As for the second season, it never existed, m'kay?)

Naraku.

Whether they are actually good from a realistic standpoint is another matter, though. Some just go by edgy aura.

With this relaxation of the criterion, I'd say

from The Witch from Mercury fits the bill.

Feels like a cheap answer tbh. One can probably mention quite a few Gundam antagonists in this thread.

Izaya Orihara from Durarara

Naraku from inuyasha, incredibly manipulative and has no qualms uses his own minions to play games with inuyasha, sango, sesshorama,,,etc in his ultimate goal to acquire the shinkon jewel(which has sentience), which ironically is playing games on the inuyasha-universe, both humans, hybrids and demons alike. strangely he has no animosity against humans, only when it convenient for him to use them as bait for the main atagonists. his mind games often leads to death of his the demons/humans he uses, so it doesnt come back and bite him later in the series.

Lelouch against his enemies overall come to mind, specially on the later half of the series.

Johan Liebert from Monster

Lelouch for male, Maomao for female