William B Hartsfeild Worked with other leaders to annex lands and triple the size of Atlanta
Explanation:
William B Hartsfeild was the longest serving mayor in the US history and was the defining force in making Atlanta a city bustling with commerce and trade.
Under him the city got the revaluation as the city that was too busy to hate as it bought land and urbanized suburbs across its land and developed factories and more businessmen in his time.
He was overseeing the complete economic change of the city during his tenure and thus is response for the annexation and the eventual tripling of the size of the city.
