Some WONDERFUL films mentioned: Shawshank, Blade Runner, When Harry Met Sally, Star Wars (the originals, with Empire still possibly the best), Indiana Jones (Raiders and Crusade for me - and yes, Harrison is a beautiful, beautiful man), Ferris Bueller, Ghostbusters, True Grit (actually prefer the Coens version, great book too), North by Northwest… I’d add Rear Window as my favourite Hitchcock, Jaws, Close Encounters, Gross Point Blank, Die Hard, Airplane! there are almost too many to name - but why not keep trying?
However, there can only ever be one that’s truly GREATEST…