#3 - Daniel Ricciardo
The man with the evergreen smile in Formula 1 drives for Renault these days, but was a part of the Red Bull organization between 2008 and '18. Like Sainz, Ricciardo's time in Renault 3.5 got him a F1 drive, for the HRT team part-way through 2011. He impressed for the struggling Spanish outfit, and earned a drive alongside Jean-Eric Vergne at Toro Rosso the following year. It was a tight affair between the Honey Badger and the Frenchman, and a close competition for who would replace Mark Webber at Red Bull for 2014.
Christian Horner and Helmut Marko opted for the Aussie, a decision that was definitely the correct one in hindsight. Ricciardo was the surprise of 2014, taking to the V6-turbo cars like a duck to water and winning three races during the season, the only driver other than the Mercedes men.
Red Bull haven't had the car to challenge for the title since 2013, but Ricciardo has often been the man to capitalise when the Silver Arrows have slipped up. In total, he's won seven races, and there's expectations that Daniel will be able to return to the podium for Renault sooner rather than later.