What are other people’s favorite actor self parodies in art (where an actor plays themselves with exaggerated, comical or made up personality traits).
I’d say Carl Weathers on Arrested Development is my favorite.
Neil Patrick Harris in the Harold & Kumar movies.
Yeah, that was a great one.
Oh I’m gay, I’m gay for that pussy.
Neil Patrick Harris in the Harold & Kumar movies.
Larry David on Curb Your Enthusiasm.
Jerry Seinfeld in Seinfeld.
Gotta mention John Malkovich in Being John Malkovich.
I don’t think David and Seinfeld were parodies, I think those were fairly true to life representations of their personalities.
Then I’ll mention Lou Ferrigno in The King of Queens.
And also in the movie “I Love You, Man.”
What cracked me up is when he first showed up I thought, “he looks familiar, where did I see him before?” Then they immediately cut to the scene in Predator where he gets his arm blown off 
and I’m like, “oh yeahhh!”
This is the End is a great self-parody of half a dozen actors.
Everyone in every episode of The Larry Sanders Show, but the prize goes to David Duchovny.
William Shatner, in everything he’s done since Star Trek.
(Yes, I know there were many different characters, but they were all basically William Shatner playing William Shatner.)
The second person to come to mind is Jack “I’m thinking it over!” Benny.
Now, cut that out!
Actually, Shatner’s best self-parody was in Free Enterprise, especially for his Shakespeare rap.
Vanilla Ice in That’s My Boy.
I still think he’d have made a great Desdemona.
Bob Barker, although not strictly an actor, in Happy Gilmore.
“The price is WRONG, bitch!”
Sarah McLachlan in the superbowl ad where she makes fun of her own save the dogs ads.
(bolding mine) The way you used that word leads me to believe that you don’t know what it means.
Extras had many, but I especially liked Ian McKellan’s acting advice.