Thanatos
Thanatos (Rick Jones, typically from Earth-9309) appears in 7 issues in grailworth's catalog, and was first published in 1993. First appearance: Spider-Man 2099 #11 (1992), cover dated 1993.
First appearance
Every appearance we value
Captain Marvel (2000) 4 issues
Spider-Man 2099 (1992) 3 issues
Character appearances from the Grand Comics Database, CC BY-SA 4.0.