Robert Greenberger
Robert Greenberger is credited as writer on 15 issues in grailworth's catalog, 9 issues of them across 8 series we value. Characters first seen in issues they wrote or drew include Alexander Luthor Jr. and Pariah.
Characters they introduced
Every issue
Action Comics (1938) 1 issue
Batman (1940) 1 issue
Crisis on Infinite Earths (1985) 1 issue
DC Comics Presents (1978) 1 issue
Secret Origins (1986) 2 issues
Star Trek (1984) 1 issue
Suicide Squad (1987) 1 issue
Credits from the Grand Comics Database, CC BY-SA 4.0.