YOU SAID:

I am the greatest person that has ever lived

INTO JAPANESE

私はこれまでに住んでいた最高の人です

BACK INTO ENGLISH

I am the best guy I have lived so far.

INTO JAPANESE

私はこれまでに生きてきた最高の男です。

BACK INTO ENGLISH

I am the best man I have ever lived.

INTO JAPANESE

私は今まで生きてきた最高の人です。

BACK INTO ENGLISH

I am the best person I have ever lived.

INTO JAPANESE

私は今まで生きていた最高の人です。

BACK INTO ENGLISH

I am the best person I have ever lived.