Mad to the Bone

The monster or Ygor, who's saner?
This question is not a no-brainer
Though the henchman's a loon,
The big dense one's a goon,
And his cranium's just a container.

Béla Lugosi is Ygor, and Lon Chaney Jr is The Monster in The Ghost of Frankenstein (Erle C. Kenton; 1942). Title by bone-weary David Cairns.