Aesir,
You are right about what JAR-OPS lists. On the two or three occasions that I have been involved in getting a new AOC sorted, they have said that to fulfil all those roles you need two people, as a minimum. It does not need to include a CP, but you won't get away without the nominated postholders between them covering those roles/qualifications & experience that a CP has. You can split the role and/or call it something else but (not unreasonably) all the CP skills etc have to be there somewhere. That's one of the reasons why I suggested that it would be good to know what other postholders experience was too.