from previous list:

(adjs)
gnathonic
obsequious (and synonyms)
unctuous
ingratiating

so, from thesaurus.com
obsequious
Definition: groveling, submissive
Synonyms: abject, beggarly, brownnosing, complacent, compliable, compliant, cringing, crouching, deferential, enslaved, fawning, flattering, ingratiating, kowtowing, menial, obeisant, oily, parasitic, parasitical, prostrate, respectful, servile, slavish, sneaking, sniveling, spineless, stipendiary, subject, submissive, subordinate, subservient, toadying, unctuous

(also, from fawning)
adulatory, bootlicking, bowing, cowering, crawling, humble, mealy-mouthed, scraping

and, from me:
meeching
oleaginous
smarmy [crossthreading!]
sequacious
sycophantic, sycophantical, sycophantish

FYI
meeching
Now regional (chiefly New England)
skulking, furtive; mean, cheap, contemptible; poor, obsequious