In playing Quidditch Champions, each pitch has a commentator from the films/books. Burrows has Fred and George (who also partly commentates the Forbidden Forrest alongside Hagrid. Lee Jordon, of course, commentates the Hogwarts pitch. All of these characters, being the obvious with Fred and George, are the funny guys in the series.
Rita Skeeter COULD be seen as funny in a certain angle, but she also turns into a beetle. She is probably more Shakespearean comical.
All of these have me thinking that Ilvermorny's Eula Puente, Durmstrang's Áillun Wärnach, and Beauxbaton's Tufitran d'Aubert are also equally comical.
In extension to this, in the book version of 'Goblet of Fire' , and absent from the film adaptation; Ludovic Bagman, has a lot of moments with Fred and George commentating and bidding as well.