Answer:
Most: Transfiguration Prof. (I can't write the names of anyone I'm sorry!)
Least: Defence Against the Dark Arts Prof.
Explanation:
Harry's Transfiguration Prof. was one of the professors who was present when the Headmaster gave Harry to his aunt and uncle, and she grew to care for him.
His Defence Against the Dark Arts Prof, on the other hand, not only does not have the same compassion as his Transfiguration prof, and he always seems to be present when something goes wrong.
