Man, this question pops up in every book forum eventually. The Pulitzer site itself is... fine, but honestly kind of a mess for browsing. Their official archive has the list, sure, but it's buried in year-by-year pages. I always just go straight to Wikipedia's "Pulitzer Prize for Fiction" page. It's a clean, sortable table with all the winners, plus the runners-up (the finalists), which the official site doesn't always highlight well. It's weird how the most 'official' source isn't the most usable.
For a more curated feel, the Literary Hub site sometimes has articles that list winners with brief commentary, which is more fun than a sterile list. But if you want the definitive, no-frills data, Wikipedia is shockingly reliable. I cross-referenced it once for a project and found it to be spot-on. The runners-up list is actually the real treasure there—so many great books that almost won.