That doesn't look too bad.  One might object to a few things though.  First, no documentary appears on the list, unless you count the Lumiere shorts.  Nanook of the North, maybe.  I'll admit, my knowledge of non-fiction cinema is pretty limited.  

Second, there isn't any straight comedy here.  (I don't think the Renoir counts.  I suppose one could also make a case that Un Chien Andalou is a comedy.  Perhaps, but I'm not so sure that it's been influential AS a comedy.)  However, I'm not so sure what comedy to put up here.  Any suggestions?  Or do we not want one at all?  A Chaplin might seem an obvious choice, although I'm not so sure how influential he's been.

Third, there isn't much genre work here:  no western, no musical, no gangster film, no film noir, etc.  I think that of the genres, the western may be important enough to have a representative here.  (Of course, this may all depend on how important you think that American cinema is to the cinema in general.)  Anyway, I suppose it ought to be Stagecoach or The Searchers, right?  (Does anyone think we need a musical here?)  

Fourth, I'm not so sure that The Terminator and Pulp Fiction belong here.  They've certainly been influential, but they simply seem too recent to have been THAT influential.  

And finally, a few films that haven't been mentioned yet:
Melies shorts (A Voyage to the Moon?)
The Great Train Robbery
The Night of the Living Dead

(I'm having some trouble coming up with more for that little list.  But this will be in the back of my mind the rest of the day, and so maybe I'll come up with some other things.)