"Essential" is subjective

They are putting films like Blade Runner on another list.
Writers' Note: In order to restrict ourselves to 50 films, we opted to dismiss speculative films which deal with dystopian futures: as a result, great films like 'Blade Runner', 'Fahrenheit 451' and 'Hardware' will not be found in this list. We'll get around to those at a later date...
As for howard the duck.. who knows how that made it. Its definitely not a movie I would consider when making this list.
so i think its safe to say this top fifty is tres flawed

Its not the list I would make.