Harry loved his original Star Wars film poster, now he can get the original Trilogy, as well as others, all nicely framed up. He has an awful lot of wall space now.
Monty Python and the Holy Grail would doubtless be on the list. What others? Highlander I think as he used it to mock Nick. Frozen would also be on the list (to Maggie’s Delight and to have a jibe at Mab)
Lord of the Rings Triology obviously. Spider-Man (Sam Raimi) Trilogy. the MCU films (he is still two years away from Dr Strange)
Indeed with the Great Hall add a cinema screen and see if the Swartalves can make him a cinema projector (and popcorn machine) failing that for Bob to project upon.