I think we have an excellent start on the Russian Generals with Alexander Mikaberidze's "Biographical Dictionary of Russian Generals of the Napoleonic Wars" and could use one for other nationalities.
Unfortunately, for us to copy the British general officer biographies from the Dictionary of National Biography would be a major violation of their copyright. So we would have to have someone compile them from a variety of sources.
Are you volunteering to do one for the Belgian officers? :-)