Colquitt and Brown were two member of the Atlanta Ring. Grady played important roles in Colquitt and Brown's political strategies helping them to win in elections .
The correct answer to this open question is the following.
The two members of the Atlanta Ring that Grady endorsed helping them to win in elections were Joseph E. Brown and John B. Gordon.
Henry W. Grady (1850-1889) was the managing editor of the newspaper "The Atlanta Constitution." That's when he became a member of the political groups called "The Atlanta Ring." He used his powerful position in the newspaper to influence in Georgia politics with his white supremacist views and supported the nominations of politicians such as }Joseph E. Brown and John B. Gordon.
