(n.) One who loves mankind and seeks to promote the good of others, usually through charitable gifts\.

Maecenas Robin Hood Santa Claus almoner almsgiver angel assignor awarder backer benefactor benefactress benevolist bestower cheerful giver conferrer consignor contributor do-gooder donator donor fairy godmother feoffor financer funder giver grantor humanitarian imparter lady bountiful patron patroness power for good presenter settler social worker sponsor subscriber sugar daddy supporter testate testator testatrix vouchsafer welfare statist welfare worker well-doer