There's a difference to using your left foot for braking (while not throttling) and doing the "left-foot-braking" which is used to balance the car to improve turn-in.

From what I've heard from various interviews, Ogier's style is to brake before corner, roll through the corner and apply throttle upon reaching exit angle. Thus there's no simultaneous braking and throttling.

Out of the current drivers Esapekka Lappi seems to be a heavy left-foot-braker, braking lights are alight while turning as well. Remember when he and Ogier were teammates at Citroen, they struggled to find suitable front diff ramps for Esapekka.