Pyreus Kril the Firelord: Pyreus Kril was a Nova Corpsman before volunteering to fill the role of Herald of Galactus. With his fire-welding powers, Firelord was formidible member of the resistance against the Annihilation Wave.
Gabriel the Air-Walker: Gabriel Lan served with Pyreus Kril as a Nova Corpsman before being abducted by Galactus and made a Herald. When he was killed by the Ovoids, Lan's soul was placed inside a robot body.