Olivia Coleman or Doon Mackichan
Gah, you teased me with Olivia Coleman but didn't give her as a vote option. Probably got bigger fish to fry. Failing that Doon Mackichan (http://www.imdb.com/name/nm0533489/?ref_=tt_cl_t4 currently in Two Doors Down on the BBC) would make an excellent Doctor Who. Just needs a handsome assistant.