I have not studied ethical philosophy in any formal way. But I found it interesting to follow this tip from Doug Chaplin to the Ethical Philosophy Selector. My results are interesting:

	1.	St. Augustine (100%) Information link
	2.	Aquinas (94%) Information link
	3.	Kant (88%) Information link
	4.	Ockham (83%) Information link
	5.	Spinoza (79%) Information link
	6.	Ayn Rand (67%) Information link
	7.	Aristotle (64%) Information link
	8.	Jean-Paul Sartre (57%) Information link
	9.	Jeremy Bentham (55%) Information link
	10.	John Stuart Mill (52%) Information link
	11.	Nietzsche (52%) Information link
	12.	Nel Noddings (51%) Information link
	13.	Prescriptivism (50%) Information link
	14.	Stoics (45%) Information link
	15.	Cynics (42%) Information link
	16.	Epicureans (39%) Information link
	17.	David Hume (38%) Information link
	18.	Plato (28%) Information link
	19.	Thomas Hobbes (11%) Information link

So, while I have problems with the theology of Augustine of Hippo, it seems I am close to him in ethical philosophy. Given how I answered, it is of course not surprising that I am closest to the two major Christian figures in the list.