Is it possible that some of these are the same character as well? After all, Tuvok could very well have been that helmsman, then later transferred to Voyager. I'm not sure about that one though, as I don't remember the first episode of Voyager that well. Remember the holographic doctor in First Contact? "Sing a song, do a dance, I don't care, just give us a few seconds!" "This isn't a part of my programming. I'm a doctor, not a doorstop... Borg implants are known to cause... severe skin irritation. Perhaps you'd like... an analgesic cream?" classic!