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.
Deleuze is so overrated(although I am personally biased against everything that came out and was concurrent with Mai 68 in general). I don't know if you read it in French, but in French the only "French Theorist" worse than Deleuze/Guattari is Baudrillar(for how bad the concepts are).
IMO the most interesting one from that era is Clouscard.