Final answer:
Pachacuti was the first great ruler of the Inca Empire who brought the entire region under Inca control.
Step-by-step explanation:
The first great ruler of the Inca Empire who brought the entire region under Inca control was Pachacuti, who reigned from 1438 to 1471. He began the imperial conquests by attacking people living in the Ecuadorian lowlands and in the rainforests of what is now Bolivia and Peru. Pachacuti's most famous victory was against the Chimor, a powerful kingdom to the north of Cuzco.