The Major Film Theories: An Introduction, by J. Dudley Andrew;
Concepts in Film Theory, by J. Dudley Andrew;
Film Theory: An Introduction, by Robert Stam;
Aesthetics of Film, by Jacques Aumont et al.;
Introduction to Film Studies (latest ed.), by Jill Nelmes (editor) - It works as a complement.
The volumes below have a variety of articles by classical or contemporary film theorists, some much heavier than others. I avoided whole books by classical theorists at this time, rather focusing on diversity of viewpoints:
Film Theory and Criticism: Introductory Readings (latest ed.), by Leo Braudy and Marshall Cohen (editors) - This one includes a lot of classical stuff;
A Companion to Film Theory, by Toby Miller and Robert Stam (editors);
Film and Theory: An Anthology, by Toby Miller and Robert Stam (editors);
Film Studies: Critical Approaches, by John Hill et al (editors);
Movies and Methods: Vols. I --II, by Bill Nichols (editor);
Philosophy of Film and Motion Pictures: An Anthology, by Nol Carroll and Jinhee Choi (editors);
French Film Theory and Criticism: A History/Anthology, 1907-1939. Vols. 1 -- 2, by Richard Abel (editor) - As it says: All classical and all French.
These cover essential requisites and give a large vision of film:
Proper film theory:
The volumes below have a variety of articles by classical or contemporary film theorists, some much heavier than others. I avoided whole books by classical theorists at this time, rather focusing on diversity of viewpoints:
The beginning of the recommendations, hehe!
Ah! Regarding significant goals...
Cheers,
Lord_Frous