Gorillaz songs do a great job of saying a bunch of different things all layered together, like literally about the fictional band and simultaneously allegorically about capital-H Humanity and our collective perpetuity, the mortal coil, the [G]reat Work, whatever you want to call it. They're all super coded once you're willing to stop caring about the opinions of people who think it's weird/cringe to think about that kind of stuff.
“Fire Coming Out of the Monkey’s Head” is a great example of one I only recently feel like I “get” even though I've been listening to it for twenty years. Like, why Monkey? Just because Gorillaz, or have I looked in a mirror recently? Why a mountain? What shape are those, and where else have I encountered that shape? Without the truth of the eyes, I was blind. Probably still am to a lot of it :)
Or “Saturnz Barz” where the title is about bars in a musical sense but also bars as in jail (hint: you're in it — we all are. They have Broken Our Love.)