I don't see Carlin as overrated. I had to seek the guy's stuff out while he was still alive. No one was shoving it in my face and I wasn't constantly hearing about him from anyone.
Louis CK is great but definitely overrated with the endless adoration the last few years. Same people who feel iffy about non-white comedians are the ones who won't shut up about how he's a god. Had a coworker telling me she never heard of Patrice, didn't think Hart was funny at all, thought Rock and Chappelle were "okay," but then thinks Louis, Fallon and Amy Schumer are hilarious (and Justin Timberlake on SNL is the best thing ever of course).
Goes back to the "I can't relate" bullshit narrative.