WARNING, SPOILERS AHEAD
1st and 2nd screenshots:
At the end of Mad Max: Fury Road is a scene where they get back to the citadel, and the nurses turn on the water. It then zooms on the people down below, as they rush toward the water, and one of the people is this strikingly ugly man with deformities on his face. You can also see him in another screenshot at the end, between Imperator Furiosa and Capable.
But, as I re-watched the movie, I noticed another part in the beginning of the movie. It's where Max is first caught by the War Boys, and he's trying to get away from them. During that part he has several flashbacks from his past, the ones with the ubiquitous little girl - but also one with this same man. It's very quick, but it's there.
Do we know who this guy is?