When learning about graphic design services, one of the best ways to start is by learning about the work of Paul Rand. He is widely considered to be the father of graphic design, and his work still defines the industry. As far as graphic design companies, Pentagram is the largest and most well-known company. It has worked with industry leaders like Starbucks, Verizon, Rolls-Royce, and Saks Fifth Avenue to name a few. Their work continues to set a high standard for graphic design, but good design work is available at any price level.