That is-- the left had a list of patron saints. Freud, Marx, Russeou. Some people were absorbed into the Left like Nietzsche, though he was not a leftist at all.
My suggestion is to emphasize a whole different set of patron saints. Moses, Hegel, Kant, Gra, Israel Salanter, Rav Shach, Tosphot, Rambam, the Ari (Isaac Luria). [The Rambam, the Ari and Hegel are very Neo-Platonic so it is easy to fit them into one system.]
As for the last three the basic idea is that there is no reason to think that one could be put into a room with the Oral and Written Law of Moses and come up on my own the basic approach of Torah. If I understand the importance of learning Torah as a value in itself and of working to attain good character traits and if learning Torah in depth, then I owe a debt of gratitude to these individual who worked this out and showed the way.
What you need from each of the above thinkers is this: The Gra for learning Torah; Rav Shach and Tosphot for showing the depth of Torah; Kant for the limitation of reason and knowledge that is known but not through physical senses nor through reason. [One could have used the Rambam for that also.]
The Rambam for Torah Law, and learning Physics and Metaphysics. The Ari and Hegel for Metaphysics. John Locke for freedom and private property. The last one you could have gotten from the Two Talmuds but for some reason most people miss the message there. They think the welfare state and Socialism which is organized theft is kosher. Reb Israel Salanter one needs for good character plus fear of God.
The Gra has a whole school of disciples that are worthwhile to learn: the commentaries on the page of the Yerushalim Talmud, the Nefeh HaChaim, the Netziv, etc. The Nefesh HaChaim is important from many angles. One of the points he brings out is that intention to unite one's soul to the soul of a tzadik righteous person is idolatry.
[Rav Kook the founder or religious Zionism already incorporated Hegel into his ideas as is well known. ]