Mike Roberts
Mike Roberts is credited as inker on 36 issues, penciller on 17 issues, cover artist on 10 issues, letterer on 9 issues and others in grailworth's catalog, 5 issues of them across 2 series we value. Characters first seen in issues they wrote or drew include Wulfgar, Henry Kosterman, Lt. Ben Cooper and Chelsea Valentine.
Characters they introduced
Every issue
Death Rattle (1972) 1 issue
Dinosaurs for Hire (1988) 4 issues
Credits from the Grand Comics Database, CC BY-SA 4.0.