As cheesy as it feels to add a Narrator as a character, it definitely makes sense for Arrested Development.  Ron Howard, the producer of the show, narrates the show and even appears on screen in a cameo.  He sometimes tells the facts, sometimes makes stuff up, but is always there to keep you entertained.

Narrator Quotes

Narrator: The family continued to chant "speech, speech, speech" for no one in particular.
(clapping ceases)
Michael: Gee, after all that, I was kinda hoping somebody would make a speech.
Buster: Speech! Speech! Speech! Speech!
Michael: I'll say something.
Gob: Typical.

Tobias recently lost his medical license for administering C.P.R. to a person who, as it turns out, was not having a heart attack.

Narrator

Arrested Development Quotes

(holding stuffed animals) These are my awards, Mother. From Army. The seal is for marksmanship, and the gorilla is for sand racing. Now if you'll excuse me, they're putting me in something called Hero Squad.

Buster

Lucille: I'll be in the hospital bar.
Michael: Uh, you know there isn't a hospital bar, Mother.
Lucille: Well, this is why people hate hospitals.