Three least funniest Simpsons characters

[HopeydaFish]

So who do you think are the three least funniest Simpsons characters?

I have to go with:

1) Lisa -- More whiney and annoying than funny.
2) Disco Stu -- He likes disco. It was funny the first time. No need to keep beating a dead horse.
3) Cookie Kwan -- Yup, stay out of the East side (or is it the West side). Another one joke character that they keep bringing back.