hard worker, toiler, drone, slave, menial, lackey, grub, hack, scullion, grind, crammer, plodder, burner of midnight oil*, dogsbody*; see also laborer.
"drudge." YourDictionary, n.d. Web. 16 May 2018. <http://thesaurus.yourdictionary.com/Drudge>.
drudge. (n.d.). Retrieved May 16th, 2018, from http://thesaurus.yourdictionary.com/Drudge
One who works or toils tirelessly:
To do tedious, laborious, and sometimes menial work: