- Deep thinker - Karl Marx was one - marx or plato - Plato was one - Thinker - One who philosophizes; one versed in, or devoted to,
philosophy. - One who reduces the principles of philosophy to
practice in the conduct of life; one who lives according to the rules
of practical wisdom; one who meets or regards all vicissitudes with
calmness.
- Philosopher - One who thinks; especially and chiefly, one who thinks in
a particular manner; as, a close thinker; a deep thinker; a coherent
thinker.