Charles Darwin (1809-1882), the originator of the "Theory of Natural Selection, once mentioned that the superlative achievements of great men are rooted in the faithfulness of the unknown and obscure.
He made a case, "against the enormous importance we attach to our great men, and thought that the second, third, and fourth grade men participating in the venture are also of very high importance.
Marconi (1874-1937), electrical engineer and pioneer in the invention and development of the radio, had an assistant named Tay who was a great help in the venture.
David Livingstone (1813-1973) Mapped a great deal of the African continent, and helped end Arab Slave Trade. A handful of Africans were his companions on expedition after expedition.
Saint Paul (5-67 AD) could not have accomplished much without Silas, Timothy, Epaphroditus, and Aristarchus (who was the first to put forward and argue that the Earth moves around the sun).
Thus, the achievements of great men are rooted in the faithfulness of the unknown and obscure.