I was a Dean in the Church of England in Ireland.
My fame is usually traced to my attack on Isaac Newton's ideas of calculus, specifically his theory of fluxions based on infinitesimals, which I called "ghosts of departed quantities."
My most famous tract is The Analyst (1734), a related attack on "an infidel mathematician" usually identified as as Edmund Halley.
Not a fan of Newton's sleightsofhand using numerical algebra, I pushed mathematicians to base their mathematics within the rigor of classical geometry.
In retrospect, math historians now claim that I forced mathematicians to add rigor to to their evolving mathematical techniques...and thereby made calculus a viable science.
Answer:
George Berkeley
