Mo Leff
Mo Leff is credited as penciller on 37 issues, inker on 35 issues, writer on 12 issues, cover artist on 3 issues and others in grailworth's catalog, 10 issues of them across 4 series we value. Characters first seen in issues they wrote or drew include Sir Tyrone Neville, Clip Chance and Charlie Chan.
Characters they introduced
Every issue
Feature Comics (1939) 4 issues
Little Max Comics (1949) 1 issue
Single Series (1938) 1 issue
Tip Top Comics (1936) 4 issues
Credits from the Grand Comics Database, CC BY-SA 4.0.