>>108663328Peter Parker would be a teacher, maybe a photographer sometimes
Clark Kent would still be a journalist. We see this in One Year Later when he doesn't have his powers.
Carol Danvers could just get back into military service of some sort, or even space exploration.
Steve Rogers would be an illustrator, comic book artist.
Bruce Banner would get back into doing scientific stuff.
Fantastic Four would basically be the Challengers of the Unknown.