Hi,
No, the EHWIC-D-8ESG is double-wide and so you can only put one double-wide or 2 single-wide.
From the data sheet:
Two integrated EHWIC slots are available on the Cisco 1941 for flexible configurations for support of two modules: One double wide HWIC-D or single wide EHWIC/HWIC module and a second single wide E-HIC/HWIC module are supported.
see table-3 in this link:
http://www.cisco.com/en/US/prod/collateral/routers/ps10538/data_sheet_c78_556319.html
HTH