Seth Green

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Seth Green is one of the creators of Robot Chicken, where he also voices many characters. He played Scott Evil in the Austin Powers movies, Oz in Buffy the Vampire Slayer, Tyler in Ticks, Duane in Rat Race, Napster in the Italian Job and voices Chris Griffin in Family Guy. Tends to play The Stoic.

Has also recently voiced Ace Pilot Jeff "Joker" Moreau in Mass Effect and its sequels, as well as the main character of Mars Needs Moms (motion capture/narration only).

His IMDB page is really impressive.

Seth Green provides examples of the following tropes: