Out of curiosity, I watched "The Daleks", the very first serial to feature the Daleks. It's weird how they're simultaneously goofier and yet more terrifying than those in the new series.
Try the Cloth-Faced Cybermen (The 10th Planet?). At first glance, they make you roll your eyes, but, a minute or two into their first appearance and they're the creepiest ever.
One Day I hope to be the Man my Cat thinks I am
Where are we going? And why are we in this Handbasket?