USA
American graphic design owes everything to the immigrants and schools of Europe and Asia. The creative free spirit and melting pot of New York City (for example) also creates great work in its own right. Too bad the tide is turning for the philistines.
Designers

Paul Rand
1914 - 1996

Walter Gropius
1883 - 1969

László Moholy-Nagy
1895 - 1946

J.C. Leyendecker
1874 - 1951

Norman Rockwell
1894 - 1978

Susan Kare
1954 -

Tomás Gonda
1926 - 1988

W. A. Dwiggins
1880 - 1956

Elizabeth Colwell
1881 - 1954

Ladislav Sutnar
1897 - 1976

Fleur Cowles
1908 - 2009

Cipe Pineles
1908 - 1991

M. F. Agha
1896 - 1978

Tomás Maldonado
1922 - 2018

April Greiman
1948 -

Kris Holmes
1950 -

Jayme Odgers
1939 - 2022

Erika Giovanna Klien
1900 - 1957

Chuck Bigelow
1945 -

Armin Hofmann
1920 - 2020

Alvin Lustig
1915 - 1955

Carolyn Davidson
1943 -

Edna Eicke
1919 - 1979

Elaine Lustig Cohen
1927 - 2016

Ethel Reed
1874 - 1912

Herb Lubalin
1918 - 1981

Ilonka Karasz
1896 - 1981

Lois Ehlert
1934 - 2021

Lou Dorfsman
1918 - 2002

William Golden
1911 - 1959

Paula Scher
1948 -

Romaine Brooks
1874 - 1970

Mary Blair
1911 - 1978

Mariska Karasz
1898 - 1960