[quote="Khalid, post:4, topic:267748"]
In modern days?
1) Etienne Gilson (Catholic)
1) Hans Urs von Balthasar (Catholic)
2) Reginald Garrigou-Lagrange (Catholic)
3) William Lane Craig (Protestant)
4) Alvin Plantinga (Protestant)
5) Karl Barth (Protestant) - I don't agree with him, but his mangum opus, Church Dogmatics, has had more influence on Christianity than any non-Calvinist wants to admit.
Honorable mentions: JP Moreland (Protestant), Edward Feser (Catholic), David Oderberg (Catholic, I think? for providing the foundation for the revival of Thomism), CS Lewis, GK Chesterton, Peter Kreeft. I'm forgetting one Protestant philosopher, which would also be an honorable mention.
I was going to split this in to three lists (modern, contemporary history, all time) but I'll do two:
In all time?
1) St Thomas Aquinas (Catholic)
2) St Augustine (Catholic)
3) St John Chrysostom (Catholic)
4) St Anselm of Canterbury (Catholic)
5) Origen (Catholic/Heretic?)
Honorable mentions: Duns Scotus, St Bonaventure, Pope St Leo the Great, St Athanasius, St Gregory of Nyssa, St Gregory Nazianzen, St Albertus Magnus, Aristotle (Pagan, kind of), Plato (Pagan, kind of), and I'm probably forgetting a few.
It's tough to pick just five, isn't it?;) And just because I love Origen so much, I've got to add that he is not technically considered a heretic, but that's a whole different ball of wax.:D