Let me begin by saying this is an impossible task.
Since the turn of the 21st century, the St. Louis Cardinals have fielded a Hall of Famer every single year. For most of those Hall of Famers, their best season or seasons came with St. Louis. To narrow down 10 individual seasons is a fool's errand.
Allow me to be that fool for you.
My goal here is to rank the 10 best individual seasons for the St. Louis Cardinals over the last quarter-century. This list is by no means indisputable. Let me assure you, however, that I have spent hours researching, comparing, and dissecting dozens of individual seasons to find minute differences that can set one player over the other.