The effect of success on ego

I tend to notice a general trend among upcomers and successful people. It seems the more successful or career accomplished one is (and yes, that in itself is subjective), the more adept they are at being aware of motivations and surroundings, and in turn humbled. To me, ego feels strongest in those building the confidence and emotional armour needed to execute on a vision. Finally, perhaps it’s impossible to return ego to previous levels once achievements amount.