Jamie Trueblood/AMC As any Mad Man fan knows, Don Draper is truly one of a kind, a man with perfect style and a seemingly infinite number of complexities.

But despite his many distinct traits, fans and critics have spent countless hours over the past seven years trying to figure out which real-life ad men inspired Draper's creation and helped forge his unique personality.

From our research, four candidates have sprung up repeatedly as the advertising executives people think Draper is most likely to be modeled on.

Here's what we know about them.