Jim Callahan
Jim Callahan is credited as penciller on 7 issues, cover artist on 4 issues and inker on 3 issues in grailworth's catalog, 5 issues of them across 2 series we value.
Every issue
Hardcase (1993) 2 issues
Warrior (1996) 3 issues
Credits from the Grand Comics Database, CC BY-SA 4.0.