I've decided to keep it at just one that has to stand tall above all the others. This is the funniest fantasy book that you have ever read in your entire life. If it made you spit what you are drinking out of your mouth that's a plus. If you couldn't stop laughing and had to put the book down that's also a bonus. This is what I'm looking for.

What comes to mind for me are a few fantasy authors that meet the criteria, but it can only be one book. If its impossible to narrow it down to just one book, you can do a max of three books. Ideally, just one book.

Curious to see if there is one book that dominates all the others and is worthy of being throned as the number one fantasy book to make a reader laugh.