He is credited with creating modern medicinal research (though he detested it himself), and all around, was a highly unique character in history.
Not withstanding him destroying his competition and consolidating the market, with the goal of lowering kerosene (I may have the wrong oil-type here) by 95% as a goal for "giving to the masses."
Still many, many, many despicable acts, but a multi-dimensional man of course.
* While providing abundant new evidence of Rockefeller's misdeeds, Chernow discards the stereotype of the cold-blooded monster to sketch an unforgettably human portrait of a quirky, eccentric original. A devout Baptist and temperance advocate, Rockefeller gave money more generously--his chosen philanthropies included the Rockefeller Foundation, the University of Chicago, and what is today Rockefeller University--than anyone before him. Titan presents a finely nuanced portrait of a fascinating, complex man, synthesizing his public and private lives and disclosing numerous family scandals, tragedies, and misfortunes that have never before come to light.