I’ll go first. Mine is the instant knockout drug. Like Dexter’s intramuscular injection that causes someone to immediately lose consciousness. Or in the movie Split where there’s the aerosol spray in your face that makes you instantly unconscious. Or pretty much any time someone uses chloroform.
The comic relief only character.
No they’re not funny, you can’t write.
That’s something I appreciated about the extended version of Lord of the Rings. Gimli was still used as comic relief a lot, but in the extended version he’s a fuller, more rounded out character. Better character development just made the comic relief bits funnier.