Brian Posehn
Brian Posehn is credited as writer on 75 issues in grailworth's catalog, 60 issues of them across 9 series we value. Characters first seen in issues they wrote or drew include Emily Preston, Agent Gorman, Necromancer and Shiklah.
Characters they introduced
Every issue
Deadpool (2013) 44 issues
Deadpool: Masacre (2016) 1 issue
Halloween Party (2022) 1 issue
Mad (2018) 4 issues
Marvel Comics (2019) 1 issue
Treehouse of Horror (1995) 1 issue
Credits from the Grand Comics Database, CC BY-SA 4.0.