Mark Powers
Mark Powers is credited as writer on 60 issues, penciller on 4 issues and colorist on 1 issue in grailworth's catalog, 18 issues of them across 4 series we value. Characters first seen in issues they wrote or drew include Grimbat.
Characters they introduced
Every issue
Vampirella (2010) 1 issue
Web of Spider-Man (1985) 1 issue
Credits from the Grand Comics Database, CC BY-SA 4.0.