good-tempered 
adjective
Not easily irritated or made angry: she was amiable and good-tempered...
- Known as ‘Soldier’ or ‘Titus’, the cheerful Oates was a quiet, good-tempered individual noted for his laconic wit.
- Three months after the death, the family are still struggling to accept that the man they knew as quiet, hard-working and good-tempered had been killed so brutally.
- Parker's big-bellied appearance and his good-tempered and kind-hearted manner make him seem better suited to the role of English landlord than highly successful producer.
Synonyms
equable, even-tempered, imperturbable, unexcitable;
unruffled, unperturbed, unflustered, undisturbed, unagitated, untroubled, well balanced;
easy-going, calm, relaxed, composed, collected, self-possessed, cool, {cool, calm, and collected}, at ease, as cool as a cucumber;
nonchalant, insouciant, blithe, mellow, mild;
serene, tranquil, placid, steady, stable, quiet, level-headed
informal unflappable, unfazed, together, laid-back
rare equanimous
Derivatives
good-temperedly
- From their earliest days they were exposed to a world of ideas and discussion, of conflicting views rationally and good-temperedly examined, and they developed a respect for all who seek deeper knowledge and understanding.
- In the midst of it all you must take your stand, good-temperedly and without disdain.
- You'll good-temperedly hand over your bag to be stowed in the hold.