Have you ever heard of Saint Benildus Romancon? No, well that's not surprising. His Wikipedia page is rather sparse.
He was so good at school, became the equivalent of a substitute teacher at the age of 14. Eventually he founded a school in rural France and taught there for two decades until he died. Nothing remarkable. No wars. No brilliant speeches. Not a single book authored. No dramatic martyrdom.
This begs the question, "How did such a boring man become a saint?"
Consider the Grand Canyon. It was not formed by a spectacular explosion (notwithstanding legends of Paul Bunyon's Axe). Instead was made by the slow and constant pull of gravity on the water of the Colorado River. The progress was microscopic at the daily level, but over a couple million years - the results are amazing.