healthy person
A straightforward noun referring to a person in good health. Often used in medical, insurance, or lifestyle contexts.
Healthy people tend to exercise regularly.
This insurance is a plan for healthy individuals.
健康 is the abstract noun 'health', while 健康者 specifically refers to a person who is healthy.
Compound of 健康 (health) + 者 (person). A straightforward Sino-Japanese word.