Vettel and Webber are huge question because the good balance of the redbull. There just hasn't been a time where you see them complaining about the car or mention correcting the behaviour of the car.
From my observations Alonso, Hamilton and Rosberg DEFINITELY can master cars of varying behaviour. I always look forward to their comments on the car behaviour and most of the time they always figure out how to set up the car to drive around the problems.
They can drive calm as Button: save tyres, save fuel, drive "wild:" overtake, drive understeer, drive oversteer, they even have that on demand speed burst in qualifying when ready. They are truly multiple style drivers.
Alonso IIRC likes an understeery car
Well he really liked the 2007 mclaren.. and Hamilton liked his setups in the first half of the season very much.
"The true champions are also great men. They are capable of making difficult decisions, of admitting their mistakes and of pushing harder than before when they get up from a fall."
- Ferrari chairman Sergio Marchionne