benefactor(n = noun.person) helper - a person who helps people or institutions (especially with financial help);
is a kind of good person
has particulars: benefactress, bondsman, bondswoman, bestower, conferrer, donor, giver, presenter, donor, fairy godmother, good samaritan, do-gooder, humanitarian, improver, liberator, accommodator, obliger, offerer, offeror, patron, sponsor, supporter, provider, deliverer, rescuer, savior, saviour, sparer, uncle

   One who confers a benefit or benefits. Bacon. [1913 Webster]

benefactor, n. (fem. benefactress) a person who gives support (esp. financial) to a person or cause.

Etymology:
ME f. LL (as BENEFIT)

N  benefactor, savior, good genius, tutelary saint, guardian angel, good Samaritan, pater patriae, salt of the earth (good man), auxiliary.

N  good man, honest man, worthy, good woman, perfect lady, Madonna, model, paragon, good example, hero, heroine, demigod, seraph, angel, innocent, saint, benefactor, philanthropist, Aristides, noble liver, pattern, brick, trump, gem, jewel, good fellow, prince, diamond in the rough, rough diamond, ugly duckling, salt of the earth, one in ten thousand, one in a million, a gentleman and a scholar, pillar of society, pillar of the community, a man among men, si sic omnes!.