Hegel's Phenomenology of the Spirit, Marx's Capital, Foucault's work, von Neumann and Morgenstern' Game Theory, and the Perl 6 Apocalypses and Exegeses from the early 2000's.
I find it incredibly satisfying to stretch my brain with books that are inaccessible on the first read.
IMO the most interesting one from that era is Clouscard.
Yes I read him in french. Unfamiliar with Clouscard. Not a fan of Baudrillar either.
Didn't get around to Logique de la Sensation, couldn't stomach him after the "Capitalisme/schizophrénie" duo.