Simon Templeman without a doubt. He did the voice of Kain who is my favorite videogame character of all time. Templeman's voice might've been unpleasing to some (looks at Raziel) but I loved it. He may have been a bit loud in Blood Omen, but this helped him to display a raw sense of emotion. In later games,, his voice lowered considerably and was not spectacular in Soul Reaver. However, in Blood Omen 2 and Defiance, he redeamed himself immensely. His voice now took on a sly and evil tone, which made out and out shouting unnecessary.

Kain's voice cannot be beaten.