'Upright' in the Bible

What I have continually sought, I have not found; I have found only one upright man among a thousand, but I have not found one upright woman among all of them.

Lo, this only have I found, that God hath made man upright; but they have sought out many inventions.

For I have taken all this to heart, exploring and examining it all, how the righteous (those in right standing with God) and the wise and their deeds are in the hands of God. No man knows whether it will be love or hatred; anything awaits him.

Because to all there is one event, to the upright man and to the evil, to the clean and to the unclean, to him who makes an offering and to him who makes no offering; as is the good so is the sinner; he who takes an oath is as he who has fear of it.

The preacher sought to find out acceptable words: and that which was written was upright, even words of truth.