This is too hard. These are actually all quite good. In fact, this could just as well be a "what's your favourite episode?" poll.
And hang on, look who didn't write any of them...
RTD adds stuff to all scripts with the exception of Moffat as he stated in a interview. This relentess RTD bashing is pathetic hes done more good than your willing to give him credit for because he dared tried to alter Doctor Who from what you remembered it to be.
Actually, RTD did a major but uncredited contribution to "Human Nature"/"The Family of Blood," according to both Cornell and RTD.
I would presume he gave the idea of the basis of the story (The Hog watch) which was used for the Master story.