I enjoyed Sam Mendes' grizzly production of King Lear at the National Theatre starring Simon Russell Beale. Shakespeare's insults are wonderful:
Kent: Fellow, I know thee.
Oswald: What dost thou know me for?
Kent: A knave, a rascal, an eater of broken meats; a base, proud, shallow, beggarly, three-suited, hundred-pound, filthy, worsted-stocking knave; a lily-liver'd, action-taking knave; a whoreson, glass-gazing, super-serviceable, finical rogue; one-trunk-inheriting slave; one that wouldst be a bawd, in way of good service, and art nothing but the composition of a knave, beggar, coward, pander, and the son and heir of a mongrel bitch: one whom I will beat into clamorous whining, if thou deniest the least syllable of thy addition.