Don't you mean we are conoissuers of world cinema? Cause I know about all of those people and I live in Canada. I also must say I notice that people who are not american cite Scorsese's  King Of Comedy as highly praised and does not get the recognition at home perhaps from film reviewer's though. But of course this isn't nessecarily true, it's just what I've noted, like Taxi Driver, Mean Streets and Goodfellas are also good, my personal favorite is Goodfellas but Raging Bull I don't like as much. Tarkovsky is in the same league as Bergman, Kurosawa, Fellini and any other director you consider great.