hiring by us

[navit]

Are these sentences correct:

1) These are people whose being hired by us will be good for us.
2) These are people hiring whom will be good for us.
3) These are people whose hiring by us will be good
4) These are people the hiring of whom will be good for us.

Gratefully,
Navi

[Alan]

##2~4 possible, although #3 is extremely unnatural (borderline acceptability at best).