The 20 greatest Simpsons guest stars

for me it would be

5. Ray Romano as Ray Magini
4. Dustin Hoffman (Uncredited) as Substitute Teacher
3. David Hyde Pierce as Cecil Terwilliger
2. Jon Lovitz as Artie Ziff/Jay Sherman
1. Kelsey Grammer as Bob Terwilliger

RODNEY DANGERFIELD! As Monty's lost son! One of my favorite eps of all time!

Jackie Mason should be higher, One of the best episodes
All Star cast in "Homer at Bat" My personal favorite,
I'm very disappointed that Danny DeVito didn't make the list, Homer's lost brother Herb, Great 2 episodes, He was good enough to make a 2nd appearence, I guess someone didn't research this very well?!!! My top 3 in order

What about Phil Hartman??!!! David Hyde Pierce?

Albert Brooks should have been number 1. He did Scorio, Fat Camp guy, and Jacques (the french guy from s1)

Thomas Pynchon!

i think johnny cash should be higher on the list. along with ron howard and spinal tap. those episodes are hysterical.

You forgot Dustin Hoffman, one of the first unnamed guest stars--he was Lisa's substitute teacher.

I'd have to go ahead and say Michael Jackson, if not solely for the fact that he's a big bald white, er yellow, dude in a mental institution.

#3--Albert Brooks (Scorpio, and the fat camp guy)
#2--Barry White
#1--Michael Jackson!!!

And this, before I've even looked at the list.

And, can I say, as an honorary guest star--the city of New York, and the World Trade towers. I laugh, yet I cry.