10. Mike Henry
Fans of either Family Guy or American Dad will be instantly familiar with the name of Mike Henry. As a voice actor, Henry has appeared on both shows, perhaps most famously as Cleveland Brown in the former, (and star of spin-off The Cleveland Show) and as Jackson in the latter. Jackson is Stan's CIA colleague and former real estate agent and has appeared in numerous episodes of American Dad! including "It's Good to Be the Queen", where Stan accidentally kills Jackson's body double; "One Little Word", where Jackson reveals his son has leukaemia and "Threat Levels", where Jackson admits he used to be homosexual, until he quit selling houses.