One reporter you've overlooked, though a little older -
Sarah Jane Smith. She's born in 1951 in
Doctor Who canon, so about 46 when Superman first appears, and specialises in weird science, aliens, etc. so probably a natural for an interview.
I have her as a friend of Clark's family in my series, though I've never explained it she probably found out who he was using her alien technology, and decided to help occasionally with alibis etc.
