Jeff Dee is an American artist and game designer and a well recognized figure in the role-playing game community and game industry.
Jeff is probably most famous for co-creating Villains & Vigilantes with Jack Herman whilst still a Teenager in the 1970's.
Jeff went on to illustrate a load of material for Dungeons & Dragons and Advanced Dungeons & Dragons - comprising of interior artwork for manuals and illustrations and covers for adventure modules for both games.
Some of his most recognized work can be found in the 1st Edition Deities & Demigods book - along with Erol Otus, Jim Roslof, David S. LaForce, David C. Sutherland III and David A. Trampier - Jeff Dee is recognized as a member of the "first-generation" of D&D artists.
Rather than bandy on about his body of D&D work (which don't get me wrong I love) I want to celebrate his Superhero Art.
Villains & Vigilantes is a fantastic game also had some outstanding modules and source-books - but at the end of the day it was the imagery that caught my attention, the original rulebook was quite slim really. But the eye-candy was an absolute winner.
If you want to have a look at some of Jeffs superhero work, I suggest the following links -
Jeff Dee's Deviant Art Gallery
The Unofficial Jeff Dee Gallery Pages
It is of the Era it is, very 80's - but its clean and very imaginative - and (IMHO) Great!