In this extended letter to my children An Evening With Your Dad, I try to look into some of these universal issues.
Plato
Aristotle
Kant
The late Sidney Morgenbesser of Columbia University ranked all important philosophers by Gods, Geniuses, Bright Guys, and Competent Philosophers. Famous for his wit, Dr. Morgenbesser was without doubt a Bright Guy.
In the circle of the Gods, Doctor Morgenbesser had only three names: Plato, Aristotle, and Kant. So, it is appropriate on the splash page of this sandbox for philosophers without a portfolio that we start with these greats from which much of western thought derives.
Here is a forum I enjoy and recommend where you can road-test some of your thoughts.