Socrates to Bill Gates?
I'll go first, in no particular order:
- The Ancient Stoics
- D. T. Suzuki, Thich Nhat Hanh, and other
- C G Jung
- Alfred Adler
- Arthur Schopenhauer
- Friedrich Nietzsche
- Fyodor Dostoevsky
- Franz Kafka
- Niccolo Machiavelli (highly misunderstood, I strongly suggest starting by watching the "Learning to Love Machiavelli: Don MacDonald at TEDxBoston"
- George Pólya