Not many have heard of Benno Wissing (1923-2008), but in my book he goes down as one of the greatest designers of the last 100 years. Along with Ben Bos and Wim Crouwel, he founded the influential studio, Total Design. Wissing also worked as a painter, illustrator, set designer and architect, but is best known for his signage design for Schiphol Airport in 1967. In the 80’s he was invited to be a professor of design at the Rhode Island School of Design.
The excellent site NAGO has a massive gallery of Wissing’s work. I still haven’t had the time to get through it all — I’m only on page 8. Also, check out the monograph Benno Wissing: Grafische & ruimtelijk ontwerpen.