Charles Louis Fleischmann
Charles Louis Fleischmann (November 3, 1835 – December 10, 1897) was a Jewish Hungarian-American manufacturer of yeast who founded Fleischmann Yeast Company. In the late 1860s, he and his brother Maximilian created America’s first commercially produced yeast, which revolutionized baking in a way that made today's mass production and consumption of bread possible.
Source: Wikipedia — Charles Louis Fleischmann (CC BY-SA 4.0)