But what of female villains? And are they just the villain because of the perspective of the narrator? Because they antagonise and torment?
The best (and most memorable) female villain I've ever read is in a Jacqueline Carey trilogy. The first book in the series is called Kushiel's Dart.
It is written in the first person, from the perspective of a courtesan / assassin, and the villain, Melisandre is one of the most vile, contemptuous, scheming and ruthless women I've experienced in literature.
Heartless, unrelenting. Probably a lot of male traits in the characters behaviour. It is historical fiction set among an alternate history around the war of the roses, full of intrigue and war, and politics, but it is also entirely fiction and given the protagonist's occupation, it is also visceral, uncomfortable, and constantly visiting the hedonistic pleasures of its vast cast. I'm not making a recommendation, its probably more of a warning, still to this day, Melisandre is such a powerful, brutal character.