Donna and Rose. Always Donna and Rose. Martha is wonderful, but she isn't the "save-the-Doctor's-ass-because-he-can-never-save-himself" type. And Amy is wonderfully headstrong, but there haven't been many opportunities for her to save Eleven.
Right in the feels. My favorite part about this is that the pictures of Donna are from The Office finale. I like to think that Donna changed her name, moved to America, and started working for Dunder Mifflin.