. . . I certainly share much of your indignation. No Marx Brothers? Appalling. No Billy Wilder? The Apartment? Some Like It Hot? The Seven Year Itch? Incomprehensible.
Actually, forget about that. As a physical clown and devotee of Theatre of the Absurd, it's even more inexcusable that they missed some of the classics of silent cinema: Battling Butler, Modern Times, The General, Safety Last!
Was this limited entirely to American cinema? Well, I guess not, since Monty Python was there (at dangerously low ranking). So why not foreign language cinema? What of Jacques Tati, for whom language hardly mattered? If Les Vacances de Monsieur Hulot, Mon Oncle, and Playtime aren't the three greatest film comedies ever . . . well, that's a highly subjective assertion, but if they aren't at least in the top 100, then the people charged with paying attention are dropping the ball, including any old crank in here too unschooled in the art of film or physical staging to have seen them (which is not a comment on anyone in particular).
I could also speak to matters of comedies not recognized as comedies--Fight Club, An American Werewolf in London, the latter of which brings me to genre comedies like Shaun of the Dead . . . but you get the idea. Like you, I could agonize over the gaps.
And for the record, while I think Sandler is an acceptable actor, when called upon to be one, I find him atrociously unfunny, especially compared with some post-SNL players like Bill Murray, or even Steve Martin (who hasn't had a good film in ages, but who is still a reasonably compelling presence; maybe he, like Murray, needs a Wes Anderson, a Jim Jarmusch, or a Sophia Coppola to give him something interesting to do). Ferrell is a mixed bag with a big talent, but I'm tired of his schtick.
Still . . .
Isn't the appeal of art always subjective? I'm not saying that there isn't a difference between good art and bad art. I reject any distinction between high art and low art, but I also recognize that, once you accept any genre, subgenre, or niche on its terms, you can still measure things like content and form, unity (or unified disunity), etc.
Still, how something reaches you will usually have some relation to when and where it reaches you; cinema is, by its nature, an art of the now. The best films are as much capsules of the time in which they were made as they are timeless works of art (though the best of the best are that, too). And comedy is the most subjective of all genres, I think; we all find the same things tragic, but we don't all seem to find the same things funny.
That this subjectivity should erase history is disturbing; I think the smart person finds the roots and family tree of his or her aesthetic interests. I don't think my interest in absurdism, punk, horror, heavy metal, and gothic style have robbed me of the ability to comprehend broader movements.
History is hardly boring, but its lessons--especially where entertainment is concerned--are hugely dependent on perspective. So-called "classic" rock is a wash for me; the '70s had too much to offer in the way of proto-punk, industrial, free jazz and No Wave for me to waste my time on moustached wankers and their endless soloing. That doesn't keep me from observing the past, of course, and it doesn't keep me from acknowledging debts to the past. But since I'll NEVER call the Eagles anything but a shit band, or have more than a shrug for Led Zeppelin, I can sympathize with a rejection of the notion of classics.
Maybe the problem isn't navel-gazing; maybe the problem is that we don't look deeply enough, or we don't try to see how that navel fits into the larger context, the history of navels like ours, if you will. Maybe our subjectivity is inadequately complete, because the notion of myself supersedes the notion of self, THE self.
Now I'm just meandering, I know. This is always tough, because I have mixed feelings about canon formation. I tend to take issue with THE CANON, but I'm always forming A canon of my own, and that process would be impossible without a formal canon from which to diverge, against which to rebel . . .
In any case, to use evaluation of comedic cinema as a measure of emotion trumping fact is problematic, because art appeals to the former, and is notoriously, even necessarily ambivalent about the latter.