Try this list.
I don't think it's a bad list - it's an almost impossible job, and my top-of-my head choices for the first few positions would have been similar. But that may be because I also tend to fall, as I think this list does, into a bit of recentism.
Let's think about who is missing, and we may become more critical. The big one that leapt out at me was Ernst Blofeld, who should surely be in the top 5 ... and perhaps higher than anyone who actually gets mentioned. I have a great fondness for Fritz Lang's Metropolis, so I also quickly thought of Rotwang and the False Maria. But now many others are crowding into my mind. I notice that none of the bad guys from classic Westerns are there, for example. And none of the James Bond villains are listed - it's not just Blofeld who is missing.
Then there are lots of questions about what counts as a villain. Is Frankenstein's monster a villain, exactly? Perhaps Dracula has a better a claim. I note that they don't count the demon in The Exorcist, since they restrict themselves to flesh and blood characters, but you'd think Dracula might still count.
Anyway, how about you? I don't mean, "Do you count as a villain?" I mean, "Who do you think should be on the list?"