Dan Panosian was the artist for the original Prophet series from Image. It was the first comic series from Rob Liefeld’s Extreme Studios that I followed. There were 3 issues before Stephen Platt took over as cover artist and with issue 4 Platt (or S.Platt) was the interior artist as well. That John Prophet bears no resemblance to the Keeper of the Privy Seal.
There is a new Prophet series by Brandon Graham that is simply amazing.