There have been so damned MANY!!! I'm sorry, but I really can't list them all, but here are a few authors (in no particular order) who come to mind. You can supply the first names.

Heinlein
Asimov
De Camp
Pohl
Paine
Jefferson
Locke
Hobbes
Watterson
Le Guin
Macrae
Shakespeare
Donne
Milton
Chaucer
Anonymous
Chesterton
Twain
Russell
Aristotle
Caesar
Owen
Butler
Byron
Pope
Miller
Heraclitus
Jung
Freud
Goldwater
Carter
Newton
de Pisa
Copernicus
Shera
Lang
etc. etc. etc. ad nauseum

(I'm still being influenced.)