Ooh, now that makes it tricky. I wouldn’t say the Administrator is a favourite villain but the Sensorites are a really interesting alien species. Don’t know how I can compare them to the human villains so leaving my answer as is!
Now I’m just sitting here thinking about who the villain is in “The Aztecs”.
It’s actually Barbara isn’t it?
She prances around claiming to be a living god trying to force her own morals on an unwilling foreign culture.
Tlotoxl is actually totally justified in his actions, he’s the antagonist of that story but not really a villain.
My vote for Tegana represents my actual vote, the true villain of Marco Polo; trying not to die of thirst in the middle of the desert. I love how low-stakes yet materially horrifying some of the threats are in Season 1. Honorable mention goes to the secondary antagonist of The Daleks, dying of radiation poisoning.
While I do love the Daleks, as far as they go in Season 1, they don’t go that far for me or even crack my Top 3, which would be the following:
Kal (yes the Caveman. Yes, the Caveman stuff from An Unearthly Child is great).
The Voords (I just really like the Design, while other Stories such as Domain fleshes them out, overall their first outing is solid).
And of course Tlotoxl, whose Actor return for a different kind of Role in another of Hartnell’s finest pure Historicals that being The Smugglers. His Performance is really great, and it’s overall one of the many things that makes the Aztecs so good!
Fun Idea! Looking forward to those Posts in the future!