6. Ozai, Avatar: The Last Airbender As Fire Lord Ozai, the chief villain in Nickolodeon’s Avatar:The Last Airbender cartoon, Hamill’s low-pitched, slow-paced delivery contrasts perfectly with the almost feminine voice of the hero,  Airbender Aang. The performance isn’t as distinctive as Hamill’s best roles, though — the man who perfected Joker’s insane cackle here offers up a perfectly professional performance as a generic villain. [Clip]

4. Mark Hamill, The Simpsons In The Simpson’s tenth season, Hamill had the chance to plays himself in the episode “Mayored to the Mob.” When the actor is nearly trampled at a local sci fi convention, Homer rescues him, launching a new career as a bodyguard. Hamill gets to sing here, in a brief Guys and Dolls parody: “Luke, be a Jedi tonight, Just be a Jedi tonight, Do it for Yoda, while we serve our guests a soda….” Hamill also brought Luke to Family Guy once, performing light saber eye surgery that doesn’t go very well in a quick sidebar gag. [Clip]

3. Ripburger, Full Throttle Not the greatest of Tim Schafer’s LucasArts adventures (that would be Day of the Tentacle), Full Throttle (1995) still delivers plenty of funny hard-bitten dialog, wild plotlines, solid animation and enjoyable gameplay. The hero is the impossibly deep-voiced leader of a motorcycle gang who must battle sadistic executive Adrian Ripburger’s evil plan to take over the last American motorcycle company and use it to (hiss!) make minivans. Hamill has a strange affinity for characters who embrace The Dark Side, and Ripburger is no exception, with a sophisticated low-register elitist rumble that drips menace with every syllable. [Clip]

5. Skips, The Regular Show Hamill has a supporting role on The Regular Show, currently airing on Cartoon Network. This surreal comedy centers around best friends Mordecai, a blue jay, and Rigby, a raccoon, who work as groundskeepers for Benson, a gumball machine (remember, kids, drugs are baaaad). Hamill does the voice of Skips, the immortal yeti friend of Mordecai and Rigby, with a rough-hewn bass-heavy voice that sounds like the actor gargles with gravel between takes. [Clip]

2. Mosely, Gabriel Knight: Sins of the Fathers This adventure game, released in 1999 by Sierra, is a voodoo-laced mystery story with hours of excellent voice acting, much of it with N’awlins accents thicker than grandma’s gumbo. Tim Curry of Rocky Horror fame stars as Gabriel, a horror novelist investigating the Voodoo Murders for book material, with help from his friend Detective Mosely — Mark Hamill with a full-on True Blood drawl. Hamill says his performance was based on a mixture of Gary Busey and Randy Quaid. Also in the voice cast: Michael Dorn (Worf from Star Trek). [Clip]

1. Colonel Muska, Castle in the Sky Hamill has the pivotal role of the villain, Colonel Muska, in the dubbed English language version of Miyazaki’s anime masterpiece. While the plucky hero and heroine are searching for the fabled floating land of Laputa to explore the mysterious origin of a glowing crystal, the sinister Colonel Muska has a different agenda (hint: it rhymes with “fooling the twirled”). Unlike most of his performances, you might actually recognize Hamill’s voice here, though the menacing tone and silky nastiness are a far cry from the squeaky-voiced kid who whined about going to Toshi Station to pick up some power converters. [Clip]

We Have To Mention It: Joker, Batman: The Animated Series/Batman: Arkham Asylum Hamill created his greatest voice role to date in 1992 with his amazing work as the Joker. The Joker’s voice is a high-pitched, nasal instrument, racing from low pitch to high and back again in the course of a single sentence. It always sounds like he’s right on the verge of cracking up entirely. And speaking of cracking up, the Joker’s laugh is probably the most memorable part of the performance, thanks in part to its variety. “His laugh should be like a musical instrument,” Hamill explains. “It should sort of illustrate his mood. It could be ominous and intimidating, it could be gleeful with wild abandon, but I didn’t want to just have one rote laugh.” [Clip]