Paul Hymans (1920–21) ·
Herman Adriaan van Karnebeek (1921–22) ·
Augustin Edwards (1922–23) ·
Cosme de la Torriente y Peraza (1923–24) ·
Giuseppe Motta (1924–25) ·
Raoul Dandurand (1925–26) ·
Afonso Costa (1926) ·
Momčilo Ninčić (1926–27) ·
Alberto Guani (1927–28) ·
Herluf Zahle (1928–29) ·
Jose Gustavo Guerrero (1929–30) ·
Nicolae Titulescu (1930–32) ·
Paul Hymans (1932–33) ·
Charles Theodore Te Water (1933–34) ·Rickard Johannes Sandler (1934) ·
Francisco Castillo Najera (1934–35) ·Edvard Beneš (1935–36) ·
Carlos Saavedra Lamas (1936–37) ·
Tevfik Rustu Aras (1937) ·Aga Khan III (1937–38) ·Éamon de Valera (1938–39) ·
Carl Joachim Hambro (1939–40, 1946)