Armin Shimerman
Armin Shimerman (born November 5, 1949) is an American actor and voice actor. Shimerman is known for playing the Ferengi bartender Quark in the television series Star Trek: Deep Space Nine, Principal Snyder in Buffy the Vampire Slayer, Kramer's caddy Stan on Seinfeld, voicing Dr. Nefarious in the Ratchet & Clank series, and Andrew Ryan, one of the antagonists of BioShock. He also played Dr. Potter in the 2011 movie adaptation of Ayn Rand's Atlas Shrugged.
Known for
Star Trek: Deep Space Nine 
The Hitcher 
Ratchet & Clank 
Eye for an Eye 
Death Warrant 
Atlas Shrugged: Part I 
What the #$*! Do We (K)now!? 
Insanitarium 
Arena 
What the Bleep!?: Down the Rabbit Hole 
What We Left Behind: Looking Back at Star Trek: Deep Space Nine 
5th Passenger 
Big Man on Campus 
Bionicle: The Legend Reborn 
Unbelievable!!!!! 
Diani & Devine Meet the Apocalypse 
The Auteur Theory 
The Sublime and Beautiful 
Tricks of the Trade 
Ratchet & Clank: Life of Pie