Mr Spielbrick,
You got Karen Gillian right on the spot. And I think Matt Smith #1 looks the closest, although his hair looks more of a brown on my screen. I've just gone through this thread, and all the minifigs are just FANTASTIC! I live in the US, and the only Doctor Who episodes I ever saw were from 2005 - 2006. I've researched the others, but I was hoping LEGO might make some sets so I punched it in to GOOGLE and it pointed me here. Man, that TARDIS console room I think was your best ever.
Fan of your work,
Doctor Coolier