How do historians regard the sage King and the three cultural heroes today

Your answer would be

Modern historians consider both to be legendary and mythical.

Today historians regard the sage Kings and the three cultural heroes today as mythical figures. The three kings were the men who visited Jesus at his birth on Christmas Day. The Bible says they were wise men. A sage is an older person with experience. The three sages were regarded as exemplars of the social ethics of Confucius