Nowdays business people’s figures are most favourite vector illustrations among presenters and designers. It is easy to make them and use, but they can make your graphics look really good looking & eye catching.
Just check ConceptDraw business perople figusers pictures, you will see all kinds of silhouetes: Staff, Employed workers, Persons and Groups symbols.
Best popular vector pictures are: men, dancing people, business man.
Use human contours wise and it will help you to tell main idea of your design message.