a (person) of substance

Someone who has a lot of power, money, or influence. I think my parents were disappointed that I chose not to marry a woman of substance, but they seem to have gotten over it. Despite being a humble shop owner, his interactions with every person of the community has made him a person of substance in the eyes of the people here. Please, he's only 20! He has time to grow into a man of substance.

a woman, man, person, etc. of ˈsubstance

(formal) a person who is important, powerful or rich: In those days, a station master was a man of substance in the community.