3 adjectives to describe exactors

Our author thus, of two-fold fame exactor, Is doubly scouted,both as Bard, and Actor!

He is a severe exactor of discipline: first upon himself, on whom he imposes more than one Lent; then upon others, as one that vowed to be revenged on sin wheresoever he finds it; and though but one hath offended him, yet his detestation is universal.

But there are unmerciful exactors of adulation, who withhold the wages of venality; retain their encomiast from year to year by general promises and ambiguous blandishments; and when he has run through the whole compass of flattery, dismiss him with contempt, because his vein of fiction is exhausted.

3 adjectives to describe  exactors