All four are huge stars within the NASCAR stratosphere, and they've been on top for the better part of the past decade.
But as with any sport, there will be turnover at the top, not only in the standings but also in the race for sponsorship and merchandise sales. The stars have already seen it with the addition of Danica Patrick to the Sprint Cup level, as she has immediately taken a huge chunk out of media coverage and promotion.
But Patrick aside, there's a deep crowd of drivers who are closing in on the same level of fame. They're quietly (for the most part) building solid resumes, either with a mid-pack Sprint Cup team or decent team in Nationwide or Camping World Trucks, and are going to break out soon.
Of the dozens of drivers with that kind of star potential, these are the five who shine brightest.