“Harry Potter” fans will always remember the actor Robbie Coltrane, who sadly passed away at the age of 72, as Rubeus Hagrid, the amiable half-giant gamekeeper of Hogwarts School of Witchcraft and Wizardry and ardent defender of fantastical creatures big and small. It was Hagrid, after all, who rescued poor Harry (Daniel Radcliffe) from his abusive upbringing.