Chris Froome - 1.86/67kg
Warren Barguil - 1.82/60kg
Romain Bardet - 1.84/65kg
It's all about power to weight ratio and these guys dominate the mountain stages. When Froome won the mountain stage at La Pierre St Martin he averaged 25.3km/ph with 97 to 102 revolutions per minute, similar to the Armstrong technique.
Froome, like Wiggins before commented that he maitains a strict diet to stay at that extreme low weight.