Hello again! Gonna step outside my comfort zone with this proposal, as we are diving into the realm of fairytales for this, and a rather gruesome tale, at that (Just how I like it!). This proposal is for Bluebeard from the story of the same name.
What Does Bluebeard Come From?
As mentioned, Bluebeard hails from Bluebeard, a French fairytale/folktale made by Charles Perrault. Starting a woman named Ariadne, she is the husband of our titular antagonist, in which she discovers Bluebeard's darkest secrets.
Who Is Bluebeard?
Bluebeard is a wealthy (even if physically unsightly due to his expectedly-colored facial hair) man who lived in luxury, with many houses and great finery. Unpopular in the romance field due to this and his habit of his wives suddenly disappearing, Bluebeard was eventually successful with marrying our protagonist Ariadne, marrying him after some time of denial for eventual tolerance for his beard and his supposedly nice nature.
Some time passed, and Bluebeard eventually had to leave the country for some time due to foreign affairs. Bluebeard gave Ariadne permission to invite as many people as she like to hang out, his savings to spend on anything they wanted, and most of the rooms in the house on one condition: She must not use the small key meant for his personal closet. After agreeing, Bluebeard set off.
Although originally content with just inviting her friends and enjoying themselves, the curiosity burned inside Ariadne to the point she felt as if she had to see what lied beyond the locked closet door. Eventually doing so herself, she finds not riches or anything else enjoyable, but it a sudden twist of terror, she finds the remains of all of his other wives, dead as doornails. Turns out our friend Bluebeard isn't such a nice guy after all, and is a heartless killer who lures women to marry him before adding him to his collection of corpses/heads. Rightfully horrified at this sight, Ariadne quickly fled out of the room in panic, but the bloodied key gave solid proof of her presence in the room. Upon returning and finding this, a enraged Bluebeard threatened to silence her immediately, but Ariadne sweet-talked him into giving her enough time to pray before her demise. However, as the situation looks dire, the brothers of our hero and her sister arrive and slay the azure-haired fiend. Ariadne keeps her former husband's riches and castle after his death, later marrying herself and her siblings to spouses that thankfully aren't psychopathic murderers.
Freudian Excuse? Mitigating Factors?
Nothing to say here. Bluebeard is a cruel, heartless murderer who tricks women into marriages before killing them with no hesitation to kill anyone who discover his secrets. To add to this, Bluebeard is never said to actually have feelings for the women he marries, and if he did, I doubt he would be villainous at all.
Bluebeard is literally the only antagonist in his tale, so this is a definite pass for his story alone. As for other tales Perrault made, no villain in them is quite as nasty as Bluebeard, with examples being the antagonists in Cinderella merely being abusive, the ogre in Puss in Boots doing little in his appearance, and the giant in Hop-o'-My-Thumb generally lacking much characterization as a standard man-eating giant.
A pretty easy yes to this faux-affable serial killer.