servant, retainer - a person working in the service of another (especially in the household)

apple polisher, ass-kisser, bootlicker, fawner, groveler, groveller, truckler - someone who humbles himself as a sign of respect; who behaves as if he had no self-respect

adulator, flatterer - a person who uses flattery

goody-goody - a person who behaves extremely well in order to please a superior