Mr. Keough passed away in 2015. He was the chairman of the investment firm Allen & Co., the former president of The Coca-Cola Co. and a member of the boards of many major corporations and of his alma mater, the University of Notre Dame.

With his brothers, Jack and Joseph, Mr. Mandel cofounded Premier Industrial Corporation in 1940, eventually merging it with Farnell Electronics in a $3 billion transaction. He was a consulting client of Peter Drucker’s in the 1960’s and 70’s, and is a longtime champion of Drucker’s values. Mr. Mandel has personally founded more than a dozen non-profit organizations, and he is the author of It’s All About Who: Essential Advice from a Self-Made Leader. His deep-seated passion is evident in the mission of the Jack, Joseph and Morton Mandel Foundation: “To invest in people with the values, ability and passion to change the world.”

Mr. Buford passed away in 2018. He was an author and “entrepreneurial nonprofit philanthropist,” who in 1984 started Leadership Network, a private operating foundation, to identify and provide resources for senior ministers and staff of large church congregations (1,000-plus in attendance) in the U.S. He was also the founding chairman of the Board of Governors of the Peter F. Drucker Foundation for Nonprofit Management (now the Frances Hesselbein Leadership Institute). In January 1998, Mr. Buford launched what became Halftime, an organization to help high-powered marketplace leaders convert their faith into action and effective results. In 1999, Mr. Buford concluded a 35-year career in the communications business by selling Buford Television Inc., where he had been chairman. He is the author of four books, including the best seller, Halftime: Changing Your Game Plan from Success to Significance; Game Plan: Winning Strategies for the Second Half of Your Life; Stuck in Halftime: Reinvesting Your One and Only Life; and Finishing Well.