*I* would probably fukking love that, thank you very much. But I'm also a weird a$$hole.
With that said, I love a comic book-ass comic book as much as the next man or woman. Hell, one of the templates for the modern comic book-ass comic book, the Ellis/Hitch Authority run, is a run I consider the single most important of the last 20 years. I just want the ideas to serve the story, work under scrutiny, and not draw attention to how outlandishly clever they are (or, at least, do that AND make me give a legitimate shyt about where you're going with it).
To answer the bolded question for X-Men runs (I was never much of an Avengers fan; the only creative team to truly make me care about the Avengers was the single most significant creative team in the Avengers's history: Mark Millar and Bryan Hitch. I can most certainly justify this assertion, by the way):
-Grew up on my uncle's Claremont/Cockrum/Byrne comics, and though the stories kind of hamstrung X-Men comics for a decade because no one wanted to move past their template, a lot of the stories themselves still hold up. Despite my misgivings about the influence of Days of Future Past, it's really a masterpiece of storytelling efficiency and rewriting of a book's central concept. Writers seriously should study how much Claremont and Byrne got done in 2 fukking issues (late 70s to early 90s Claremont is also a great study for how to weave together long running plots with satisfying single issues. It even managed to not get too convoluted until the mid-80s or so).
-The 2001-2004 period was great for X-Men comics (despite the Chuck Austen atrocity that was Uncanny X-Men. Judging from his Wildcats work among other things, Joe Casey on this could have been so excellent). The top tier stuff would be runs like Morrison and co. on New X-Men (I hated how Marvel tried to retcon his concepts out of existence; I'm at least happy that Hickman isn't afraid to work with Morrison's foundation), Milligan/Allred on X-Force/X-Statix (still kind of an unheralded run in the pantheon of X-Men greats. I would put the first 26 issues of this against just about any 26 issues of any X-Men related comic ever, just excellent, funny, invigorating stuff), and Tischman/Kordey/Macan on Cable/Soldier X (in a lot of ways, doing quite a bit of what you're implying with the whole grassroots leftist quip. They got Marvel to publish a comic about post-Soviet hotspots by wrapping it up in a dialogue on Cable's general purposelessness as a soldier. That's fukking brilliant). I could probably write essays on why each of those runs are damn near X-Men classics. And that's not even getting into some of the generally good/fun stuff like District X, Exiles, or Greg Rucka's Wolverine run, among others (one of the best treatments of Wolverine-as-Man with no Name out there). Excellent era for the X-Men.
-The initial Millar run on Ultimate X-Men was good fun, if not necessarily
smart fun, merely for the sheer audacity of some of his choices (referencing Wolverine's first-ever appearance by introducing him as a villain, Arms-dealer Colossus, fish-out-of-water homophobe Nightcrawler, one of the better interpretations of Xavier as a morally-dubious manipulator, the foundations of S.H.I.E.L.D. running everything in Marvel, etc.), more than a few of which became real staples of the mainline universe. It read like an incredibly fun, if slightly vacant-headed, action movie: plots you could probably write on a napkin, but executed with both maximal entertainment and slight subversion in mind. We hate Millar now (for good reason), but he's one of the most important comics writers of the 2000s for a reason.
-Joe Kelly's Deadpool, really the definitive treatment of the character for me. I've never fully gotten into the super-comedic interpretation of the character that forgot how deeply screwed up and violent he actually was (or, at least, treated it with the appropriate gravitas), as well as how desperately he
didn't want to be that guy despite all the backsliding. Not to say I don't enjoy that version of Deadpool (the first Deadpool movie, Cable and Deadpool, Christopher Priest's work on the character right after this also veers in that direction and is good), but the darker stuff Kelly produced is where it's at for me.
-Both of Peter David's X-Factor runs are, for the most part, great. He turned me off a bit during the second one when he did his usual turn into religion, magic, and hell (as he did with Supergirl, also pretty damn good), but I loved David's take on the characters and their relationships. The mutant detectives angle didn't hurt either, and it's another one of those comics where them doing nothing but talking ends up being extremely compelling stuff. Another one for the "Best X-Men runs of the 2000s" list.
(Seriously, if you can't write a compelling comic where zero punches are thrown, just stop writing. You're fukking awful at it. I personally believe that every aspiring X-Men writer should be given a test: they have to write a spec script built around Wolverine dying, but there can't be any fighting involved in the present, and no more than nine panels of fighting in flashback. A splash page counts as nine panels. If you can't write a compelling story within those constraints, just quit.)
There's probably more "good" stuff I could think of if I really wanted to, but that about covers most of what I think are the "great" X-Men runs, and I'd rank every single one of these above just about any Hickman run ever on the level of entertainment if nothing else. And no, I don't really care for the Whedon stuff or even Remender's stuff like most people do (I think they're good, but I explained why I don't hold them in rarefied air earlier on in the thread. Not going to contest too much if you call it great, though, and I would also rank both above Hickman's work).