VOY unlike most ships, couldn't receive replacement crew e very other episodes. As such it had a chance to build up a decent secondary cast. Who we would see fairly often. Apart from Carey and Vorrik VOY failed to utilise a small number of secondary characters.
Seska, Lt. Hogan, Lt. Jonas, Suder, Niomi & Sam Wildman, the Borg Kids & Icheb don't count?