* Ramsay MacDonald: MacDonald was the first Labour Prime Minister of the United Kingdom. King was impressed by MacDonald's social reform policies and his commitment to social justice. King also shared MacDonald's interest in international cooperation and the promotion of peace.
* Ernest Lapointe: Lapointe was a prominent Canadian lawyer and politician who served as Minister of Justice and Minister of External Affairs in King's government. King relied heavily on Lapointe's advice and counsel, and he considered Lapointe to be one of his closest friends.
* O.D. Skelton: Skelton was a Canadian economist and political scientist who served as King's chief economic adviser. Skelton played a key role in shaping King's economic policies, and he was also a close personal friend of King.
* William Lyon Mackenzie: King was the grandson of William Lyon Mackenzie, a Scottish-Canadian journalist and politician who led the Upper Canada Rebellion of 1837. King was deeply influenced by his grandfather's political ideals, and he shared Mackenzie's commitment to democracy and social justice.