I usually answer these "what's the best [bla]" type questions by narrowing the scope. I'll go, 'well, I don't know about objectively best movie, but the movie [I've seen the most times/I remember from the youngest age/that gets better every time I watch it/that had the coolest box art at the rental place/that I saw in theaters/that made me cry on a plane/that I used for the basis of my cult/whatever] is [bla].' Ideally no one cares about literally settling a debate. If it's a conversation worth having they're more interested in your metrics than your findings. I find conversations about empirical ranking are tedious and always end in that anticlimactic awkward silence where everyone has exhausted their actual opinions and is trying to hastily cobble together new opinions on the spot to keep the ball rolling out of politeness.