I'm not sure I'd call him "unheralded". When I saw that description, I thought, "huh, there's someone other than Zuse I should know about?", but then the article was about Zuse.

I mean sure, he's not Turing- or Von-Neumann-level famous, but in both those cases their fame largely stems from their involvement in a number of other things as well (Turing's early AI writing and theoretical models of computing, and Von Neumann's role in the Manhattan Project and game theory). Zuse is pretty famous in comparison to the other computer-builders of the era, e.g. John Mauchly or John Vincent Atanasoff.