Thomas Aquinas' influence on Western thought is considerable, and much of modern philosophy developed or opposed his ideas, particularly in the areas of ethics, natural law, metaphysics, and political theory. You think his mind was sick?
In the third and fifth Meditation, René Descartes offers an ontological proof of a benevolent God (through both the ontological argument and trademark argument). Because God is benevolent, Descartes can have some faith in the account of reality his senses provide him, for God has provided him with a working mind and sensory system and does not desire to deceive him. You think his mind was sick?
Thomas More was an English lawyer, social philosopher, author, statesman, and noted Renaissance humanist. He wrote Utopia, published in 1516 about the political system of an imaginary island state. You think his mind was sick?
Your use of the word "sick" is troubling. You should define it better or refrain from applying it to your arguments.