Maser Patrol recently uploaded an extensive article on Godzilla Manga adaptations, and original stories, from some of the biggest names in manga.
It’s a little simplistic, but no less informative. And shines a light on a relatively obscure side of the Godzilla franchise.
Destroy All Mangaka: When Godzilla Met the Titans of Manga
Notable Tidbits Include:
*”Godzilla: Nightmare Option” - story by Nozomu Tamaki, featuring an original opponent named Gandora.
*”A Space Godzilla” - Toho supported short story, written and illustrated by Katsuhiro Otomo, about Godzilla and his new half-alien son, going into space to battle other monsters (like this gal).
*”Kaiju Senshi Godzilla” - suit actor Hurric