Very easy choice for this one, none of the other Professors even come close to McGonagall. She really is just brilliant in every way. Strict but still so brilliant in every way. Her love for the quidditch team and doing plenty to try and help them get one over on Snape and Slytherin. Constantly trying to help out Harry, Ron and Hermione yet dis-paring that they always seem to be where trouble is occurring, even if they are just in the wrong place at the wrong time.