By a people picker, would you like something that shows a hierarchy?
The RadGridView hierarchy
allows you to present a grid of information in a hierarchical way which may be of use to you.
Otherwise, the RadTreeView
may be what you're after as it allows you to present a hierarchy of information in a TreeView format with images, checkboxes etc..
Also have a look at the Integration demos that came with the product on your machine. Perhaps the Business Card example would help you.
If you need more information on any of these, just let me know.