When I was on the Ramp, it was 10 people to load a 744F. This was what the company wanted to achieve an on time turn around/departure, according to the precision timing schedule.
If it is full, you need at least 10. This is because a lot of the time is actually spent looking for the cargo. It is not lined up how it will be loaded, so you are often driving around in circles putting cargo on.
Of course there are some areas where changes to work practices may be made, but from what i've seen of most changes on the Ramp there is a consequence elsewhere. Either on time departures go down or compo claims go up. Normally it is both happen together.