Complex sentence: Nathaniel Eckersley became an important figures in the town of Wigan and left a huge legacy as banker, mill owner, mine owner, J.P., M.P., mayor and magistrate.
Split into simpler sentences: Nathaniel Eckersley became one of the most important figures in the town of Wigan and left a huge legacy. Banker, mill owner, mine owner, J.P., M.P., Mayor and magistrate.