From Longman Dictionary of Contemporary Englishgatherergath‧er‧er /ˈɡæðərə $ -ər/ noun [countable] someone who gathers something information gatherers
Examples from the Corpus
gatherer• Now 31, McMaster was a prolific points gatherer in his heyday, running in tries or kicking prodigious penalties.• Increasingly and unintentionally, the papacy assumed the odium of tax gatherer on behalf of the king.• Two main streams developed; the hunter became herdsman and the gatherer became agriculturalist.• In this scenario, man became the hunter, woman the gatherer. 