in no order:

Cloud from FF7
Link from Zelda
Sam Fisher
Carl "CJ" Johnson
Sonic the Hedgehog before he went all pokedigimangamon
Super Mario
Marcus Felix from Gears of War
Leon S Kennedy (resident evil 2 and 4)
The Redfields (resident evil 1/2/CV)
Frank West (Dead rising)
George Stobart (Broken Sword 1-4)
Guy Brush Threepwood (Monkey Island 1-4)
Gordon Freeman (Half Life 1-2... not much of a character really!)
Banjoo Kazooie
Donkey and Diddy Kong

I'm probably missing loads...