All I've seen of Adam Driver is from Girls and his brief (and hilarious) appearance in Inside Llewyn Davis.

He seems like an amazing actor. He completely steals the show in Girls. The episodes that heavily feature him are what keep me watching.

I have a feeling he will fit into the GFFA just as well as any of the original actors. He has a unique look as well, almost right out of the 70's, depending on how they manage his facial hair and costuming.

I have no doubts about his casting, regardless of the role he plays.