Multi Poster Creation (2 posters)

Looking for someone to create 2 posters for me which feature several film posters on one sheet (A3 and A2 size). I would like one for the Harry Potter series (8 films) and the other for Game of Thrones (8 seasons).

I have attached a photo example of a previous Star Wars poster I had made to give you a visual of what I am after.

Each file will need to be saved individually as a PDF to A3 and A2 sizes.

I will provide the high quality images (I will look later on today, currently seeing if people are willing to do the job for the price offered).