Yousuf Karsh is a Canadian portrait photographer out of the nations capital in Ottawa. He is/was probably the leading "portrait" photographer on the planet. He made his name internationally partly because he approached visiting leaders to Canada and requested the opportunity to photograph them. Later on the leaders were the ones that requested him.
He later travelled the world photographing famous people, artists, leaders and others, and his work was published in many magazines including Life.
It is a great compliment to be compared to him. Congratulations.