Hey guys! New to the forum here, but I thought I would add my two cents and throw my cast list (apologies if some of the choices are already re-hashed or repeated.)
Harry Dresden - Jared Padalecki (I think he could age into the role, considering he looks young enough to play SF Harry)
Karrin Murphy - Sarah Michelle Gellar or
Thomas Raith - Matt Bomer or Ian Somerhalder
Donald Morgan - Kevin McNally
Bob - James Marsters (stuck in my head since the audiobooks)
Waldo Butters - Jay Baruchel
Will Borden - Justin Long
Georgia Borden - Leelee Sobieski
Michael Carpenter - Jeffrey Dean Morgan
Charity Carpenter - Lucy Lawless (since Jim mentioned her in an interview now I can't picture her any other way!)
Molly Carpenter - Kaley Cuoco (it's a big maybe, but I think she can pull off the complexity, not just the looks)
John Marcone - Jeffrey Donovan (dead ringer when you see him play mob types in 'Burn Notice')
Nicodemus Archleone - Viggo Mortensen (it's not just the looks, but the voice that does it for me)
Deidre - Lorde (I really don't know why, I just seem to picture her like that for some reason)
Sigrun Gard - Tricia Helfer or Kristanna Loken
Sanya - Idris Elba
Shiro - Ken Watanabe or Sonny Chiba
Lara Raith - Angelina Jolie
Leanansidhe - Christina Hendricks (though she might be a bit too buxom) or Famke Jannsen
Kincaid - Daniel Craig
I welcome any suggestions and/or thoughts.