Ultraman
Ultraman (Clark Kent, Post-Crisis Antimatter Earth, Crime Syndicate, 2000-2011) appears in 7 issues in grailworth's catalog, and was first published in 2000.
Every appearance we value
The Brave and the Bold (2007) 2 issues
Supergirl (2005) 2 issues
Character appearances from the Grand Comics Database, CC BY-SA 4.0.