Bill Parker
Bill Parker is credited as writer on 37 issues, colorist on 12 issues and letterer on 8 issues in grailworth's catalog, 20 issues of them across 4 series we value. Characters first seen in issues they wrote or drew include Beautia Sivana, Magnificus Sivana, Shazam and Dr. Sivana.
Characters they introduced
Every issue
Flashback (1973) 1 issue
Special Edition Comics (1940) 1 issue
Credits from the Grand Comics Database, CC BY-SA 4.0.