(At least then, the parallel is on-target.)
I suppose the Nicomachean Ethics might get a bit more love, though it's a lot more self-centred than you might expect from the title. (Aristotle's basic question is "how should one live so as to attain eudaimonia?", and that last term means something much more like "happiness" or "well-being" than, say, "virtue".)
Which isn't to say that those works aren't historically important, or interesting, or produced by first-rate thinkers. But it does kinda suggest that if what you're after is truth, opinion and rank speculation aren't very reliable ways to get that even when done by geniuses.
(Yes, "kinda suggest" rather than "prove" or anything similarly strong; it is of course possible that we're all wrong nowadays and that, say, Descartes was right. But it's not looking likely.)