Lots of people were way more important than history books give them credit for. Do you have a favorite?
Mine are Ibn al-Haytham and Mansa Musa. For very different reasons. Ibn al-Haytham basically invented the scientific method. And Mansa Musa was such a baller that he caused inflation when he visited places.
Theres a museam in Cape Breton dedicated to him. Barely any of it was phone related.