Conversation so far:
who said the ultimate moral good was the will to power?
The will to power is a prominent concept in the philosophy of Friedrich Nietzsche.
was Nietzsche not referring to the ultimate moral good in his philosophy?
For Nietzsche, the fundamental principle that powers all life is the will to power.
who mentions the ultimate moral good in philosophy?
Utilitarianism says the the ultimate moral good is whatever brings the most happiness for the most people.

Question: any other sources?
Self-contained rewrite: any other sources mentioning the ultimate moral good in philosophy?