Clem Gretter
Clem Gretter is credited as penciller on 44 issues, inker on 44 issues, writer on 14 issues and cover artist on 1 issue in grailworth's catalog, 15 issues of them across 12 series we value. Characters first seen in issues they wrote or drew include Dan Hastings, Dr. Occult, Rose Psychic and Sander Amster.
Characters they introduced
Every issue
Blackhawk (1957) 1 issue
Blue Ribbon Comics (1939) 1 issue
House of Secrets (1956) 1 issue
More Fun Comics (1936) 3 issues
New Comics (1935) 2 issues
Real Fact Comics (1946) 1 issue
Showcase (1956) 1 issue
Sky Blazers (1940) 1 issue
Star Comics (1937) 1 issue
Star Comics (1937) 1 issue
Strange Adventures (1950) 1 issue
Credits from the Grand Comics Database, CC BY-SA 4.0.