There are people who are morally upright - they do not steal, tell lies, give or collect bribes, commit adultery, fight or harm anybody in any way. They are peace lovers and go all out to please and help others. They are always quick to forgive those who deliberately hurt or malign them. Such people are willing to forego their legitimate rights for peace to reign. However, the gospel affirms that no matter how good a person is, he must still repent and believe in Christ for salvation. What then is the fate of good, honest and peace-loving people who never heard the gospel or who do not subscribe to such doctrines?

You have just asked two totally different questions

1: what is the fate of people who never heard the gospel? - They shall be judged according to their conscience. This is in Romans 2.

2: What is the fate of good people who rejected the gospel? - Well there is no salvation outside Christ. They will not inherit the kingdom of God because Jesus Christ is the only way to that kingdom. How can you get to a place without knowing where you're going?