In Matthew 19:16 rather than call Jesus good, the man asks what good is necessary to achieve never-ending fullness of life.
In both Matthew and Mark the Greek is agathos. In Greek culture this is an especially loaded term. The object of philosophy was sometimes described as seeking the good, the true and the beautiful. The heroes of Homer were agathos. The key to happiness is to become noble and good.
In the Nichomachean Ethics (IV,2) Aristotle writes:
The happy person always, or more than anyone else, does and reflects on actions in accordance with virtue and bears his luck in the finest way possible and in a way that is harmonious in absolutely every respect as someone who is truly good (alethos agathos) and four-square beyond reproach. Many great pieces of fortune will make his life more blessed (for these naturally help adorn it, and the use of them is fine and decent). But if they happen the opposite way, they crush and maim blessedness, since they bring pains and impede many activities. But nevertheless even in these circumstances the fine shines through when anyone calmly endures frequent great misfortunes, not because he is hardened to them, but because he is a man of nobility and great-heartedness. We think the truly good and sensible person bears all chances gracefully and always makes the finest things possible from his circumstances, just as both a good general uses the army at his disposal for the very best effect in war and a cobbler makes the finest shoe from the skins he is given.
Jesus was truly good. Jesus both taught and demonstrated the way of the hero. In this meaning we are each called to be heroic.