Excellent overanalysis, but I don't think you are quite going deep enough. We could start with Wordsworth vis-a-vis Don's position as an antihero: "I wandered lonely as a cloud" and such.

Best line in the show's history.

Yes, of course. There is no difference between inspiration and a blatant copy in the realm of citationality. Abed Nadir is simply an iteration of Scotty Pelk.

Does Harmon ever mention how much Abed owes to Malik Malkasian's portrayal of the eponymous Film Geek in James Westby's film? I like Community, but that's always bothered me.

There has not been great American writing since the 1950s. First, we went through the rounds of counterculture navel-gazing under the auspices of Confessionalism (poor Robert Lowell…the legacy of his talent deserved so much better than his heirs).