Gerhard
Gerhard is credited as inker on 12 issues, penciller on 11 issues, colorist on 11 issues and cover artist on 4 issues in grailworth's catalog, 5 issues of them across 3 series we value. Characters first seen in issues they wrote or drew include Savanti Romero, Renet and Lord Simultaneous.
Characters they introduced
Every issue
Epic Illustrated (1980) 3 issues
Turtlemania Special (1986) 1 issue
Credits from the Grand Comics Database, CC BY-SA 4.0.