Edward Tufte is Professor Emeritus of Political Science, Statistics, and Computer Science at Yale. His work in data visualization is widely considered to be foundational to the field.
William S. Cleveland is a Professor of Statistics and Professor of Computer Science at Purdue. He is known for his work in data visualization and statistics.
Stephen Few is the founder and principal of the data visualization consulting agency, Perceptual Edge. His work is informed by his extensive background in business intelligence.
Alberto Cairo is a Professor of Professional Practice and Knight Chair in Visual Journalism at the University of Miami. He is well known for his background and work in data journalism.