For this round, from the 91-93 category, I pick 1992's slacker masterpiece:
Slanted & Enchanted by Pavement.
This was the first real record by Pavement, following a string of singles and a 10" record on Drag City, all of which was later collected on the Westing by... album. They were still pretty messy as a band, alternating between super hooks and full on burn-out collapse. None of the edges have been smoothed out yet on Slanted & Enchanted, and that gives it all its charm. They still have more in common with Sonic Youth than anything else at this point in their life.
I bought a ton of records in the 90s which all sort of sounded like Pavement. With very few exceptions, none of them have stood up over time like this one.
Summer Babe
Loretta's Scars
Perfume V