system
Given the following post, respond as if you're commenting on Reddit:
human
[General Fiction] What are some examples of henchmen, or "right-hand-man" who is much stronger and dangerous than the main villain, but follow the villain anyways (not for financial reasons)?

I'm always curious about characters who seem to be EXTREMELY powerful, sometimes much more than the main threat or perceived antagonist, but they still prefer to be more of a side-character, almost henchmen level. 

I don't want it to be for some sort of financial reasons, since I know many weak but rich villains use money to buy power such as say, Penguin in Batman. I'm looking for example where they do it out of some other purpose. 

I guess a generic example would be....lets say the main baddie wants to achieve rule the universe but is capable of dying, whereas his right hand man is immortal. Does that make sense? Like, why would the henchman even work for someone like that?

Another exmaple would be like, Ebony Maw following Thanos (w/o Infinity Gauntlet), why doesn't Ebony just use telekinesis and fling Thanos away?
gpt
There is Dr. Girlfriend (later known as Dr. Mrs. The Monarch), who is the lover/wife/right-hand-woman to The (Mighty) Monarch.

She might not be quite as dangerous as the Monarch, but she is certainly much smarter and better at organizing a criminal enterprise, and is also usually the only thing keeping the Monarch from being completely worthless.