Who's the most unforgettable Biblical villain for you?

As people, we all have the worst tendencies we can give in to. That’s why we admire heroes. We admire the strength they have for avoiding into falling into their worst tendencies. They’re the people we look up to.
But what about villains? They’re not someone you want to be but we can learn a lesson or two from them. I’m someone who’s more interested in villains than in heroes. What I can admire about villains is understanding their root motivation for doing what they do. In their eyes, what they are doing is “right.” We have our own villain to face every day, whether in ourselves or in others.
So mine is Delilah. She was able to trick Samson to reveal the secret behind his strength and sold this intel to the Philistines. She did this all for money. Don’t we have people like that today? And how can we use our faith to protect ourselves from them? The answer to these questions is an entire topic already.
So, who’s the most unforgettable Biblical villain for you?