syc·o·phant
?sik??fant,?sik?f?nt/
noun
a person who acts obsequiously toward someone important in order to gain advantage.
synonyms: yes-man, bootlicker, brown-noser, toady, lickspittle, flatterer, flunky, lackey, spaniel, doormat, stooge, cringer, suck, suck-up