No, it’s the best film period. And I say that as someone who is usually into dramas, and not much of an action/adventure fan.
That’s not really much of an argument though.
I mean if it’s your favourite film I’m not criticizing that. It’s one of my favourite movies as well.
However, your claim is somewhat, well, “exaggerated.” Calling it one of the best sci-fi films ever made I’d agree with immediately. Calling it one of the best film in general however is something I’d feel no reason to criticize, though I’m not sure if I would personally agree, and that’s coming from someone who really loves that film.
Also my previous statement wasn’t to claim that Citizen Kane is THE best movie of all time, although I’d definitely call it one of the best myself. I was being somewhat half-sarcastic, but mostly just trying to differentiate good artistic standalone films from the kind of Ed Wood films that hardly deserve to be called movies.