Matthew Carter (type designer), Wim Crouwel (type and graphic designer) and John Maeda (designer and technologist), are three very outstanding people in graphic design. All three of them have different approaches to their work, but their collective aim is to the find a solution to the problem. Matthew Carter designed some of the most widely used fonts of this time (Verdana, Georgia, Tahoma, etc). Wim Crouwel founded Total Design studio and created the New Alphabet font. John Maeda studied and worked at MIT, eBay and STEM. All three of these people have a crucial part in design history as innovators and problem solvers, creators and reformers.
You can watch videos about them and their works beneath.