I would have thought that too about Rachel Bilson, but I saw this photo of her and thought she could fit the exotic look described in the novels.  Exotic look.  She's part Italian so I think she could pull it off. 

Marcone is kinda tough to figure out.  It's hard to find someone who can pull off that evil or good look. 


I have a few more picks here.

Butters - Christopher Mintz-Plasse Geeky guy who believes polka will never die!  Yes I know he was McLovin in Superbad, but I can picture him in a polka suit, shaking, in front of a zombie dinosaur.  Just something about that kid fits for me.


Morgan - Javier Bardem Keeping an eye on Harry  Yes it is the same guy that played the hitman in No Country for Old Men.  I would hate to have him looking over my shoulder.


Sanya - Chiwetel Ejiofor I couldn't find one of him holding his sword from Serenity  Yes this is the guy that played the Operative in Serenity. 


Ebenezar - Is it just me or do you picture Uncle Jesse from the Dukes of Hazard when you read his description?..lol


Do you think it's more important they "look" the the descriptions or that they can pull of the character?  Most of the time I've been racking my brain thinking of folks that fit both, but yet I always go to if they could pull it off.  That's one reason why I liked Paul int he TV show, watching him and reading about Harry was pretty close to being the same.  The same with Bob in the TV series.  Granted Terrance Mann wasn't as girl crazy, but those times when Bob said something to protect Harry in the tv series I could almost imagine that in the book.  Take the whole trying to kill Harry thing and how sorry he felt afterward (or before-ward).  So I dunno, what do you guys think is more important to casting the role(s)