It seems you're thinking of the character Vork from the "A Song of Ice and Fire" book series and the "Game of Thrones" television adaptation. Jeff Lewis is not the actor who plays Vork.
There isn't actually a character named "Vork" in either the books or the show. Are you sure you have the name correct?
If you're thinking of a different character, please provide more details and I can help you identify the actor who plays them.