Which Doctor Who Villain Is The Best?

The title says it all. Through the years (about 50 now), we've seen a lot of different Doctor Who villains. But which one is the best? For this post, I'm only going to include villains that have made multiple appearances. In no particular order...

1. The Daleks
Evil machines of death with no emotions or conscience. Their goal is to EXTERMINATE all life-forms that are not Daleks. These monsters have showed up a lot.

2. The Cybermen
Like the Daleks, the Cybermen are emotionless. They are metal men, and their goal is to "upgrade" all of humanity into Cybermen.

3. The Master
Like the Doctor, he is a Time Lord. He escaped the Time War by temporarily becoming a human. He's insane and always hears a pattern of four drumbeats in his head, which he claims call him to war. He's pretty evil.

4. The Silence
Wait, who? These monsters can make you forget them, and they've been meddling with human history for centuries.

5. The Silurians
These look like lizards, but they're actually aliens. While they were originally the Doctor's enemies, the last Silurian, Vastra, teamed up with Jenny (a human) to help the Doctor.

6. The Sontarans
These monsters look like potatoes. Again, the last Sontaran, Strax, changed from being a bad guy to a good guy.

7. The Weeping Angels
Don't blink. Don't even blink. They are fast, faster than you can believe. Don't turn your back on them, don't look away, and don't blink. Good luck.

8. The Autons
They look like just innocent mannequins, but they will kill you without a second thought. They are living plastic, controlled by the Nestene Consciousness. As seen in The Pandorica Opens and The Big Bang, they might think they are human when they really aren't. Rory came back as a Roman centurion, but he was really an auton. Except he was too strong for the Nestene Consciousness.

9. The Zygons
Big red, rubbery things, covered in suckers. Surprisingly good kissers.

10. The Ood
Their appearance may be a little... ood (pun intended), but they're still formidable. As with the Silurians and the Sontarans, eventually they became good. They foresaw the Doctor Donna, the human Time Lord who sadly could not last.

So that's the list. Did I miss any?