In the current issue of Back Issue, no. 13.  Joe reveals that E-Man's face was based on Roger Moore.
     ".....and I realized that was the look I was looking for, just more of an Americanized version of Roger Moore.  Just charming and heroic looking, but kind of generic.  He didn't look stupid, but he looked kind of heriocally in the ballpark there."
Image from Back Issue, no. 13.  Art by Joe Staton.