I did Waiting for Godot, Frankenstein & Heaney!
My related text was the Hunger Games and I linked them through violence! Although it worked for worlds of upheaval, there was only so many body paragraphs I could make which related to all of them (e.g.,violence, time, and grief)
But pick whatever you enjoy reading/watching and make sure you are ready to reread/watch it multiple times cause you really need to know your related text and its context.
Ask your teacher what past students have done and what they would recommend to help you get started.