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Frank Lloyd Wright, while a contemporary of Sullivan and influential in architectural circles, is best known for his residential designs and the concept of organic architecture. Although he contributed to architectural innovation, he did not focus on skyscraper design in Chicago to the extent that Sullivan did.

Louis Sullivan's designs, such as the Wainwright Building and the Auditorium Building, showcased his innovative use of steel frames and large windows, which were critical in the development of skyscrapers. His ideas and philosophies significantly influenced the architectural landscape of Chicago and the evolution of tall buildings.

Le Corbusier was a Swiss-French architect known for his modernist approach to architecture, particularly in Europe. His work came after the early skyscraper innovations in Chicago, and he focused on urban planning and functionalism rather than the specific technical advancements in skyscraper construction.

I. M. Pei was a prominent architect known for his modern designs and iconic structures, but his career emerged much later than the early skyscraper movement in Chicago. His contributions to architecture do not relate to the initial exploration of skyscraper concepts pioneered by Sullivan.