Are good people in Heaven?

Short answer: No

Heaven doesn't contain "good" people, it contains forgiven people.

God is holy, God is perfect, and only those who likewise are holy and perfect can enter into his presence.

Humanity is not holy, humanity is not perfect, all of us are flawed, all are sinners.

If God had not intervened with the Incarnation, if the Son of God had not died for our sins and if he had not been raised to life for our justification, the gulf that exists between God, who is holy, and humanity, which is not, would have remained separating us from God forever.

Heaven isn't for "good" people; good isn't good enough, only perfection will work, and since the only way for a human being to be perfect is for God to forgive us, and give us his righteousness (through Christ), the only people who will join God in heaven are those who by faith have been forgiven.