2Pac doesn't have a top 50-150 tier album...yes he has classic(s) but like I said about Lauryn it's not that “of all time regardless of genre” kinda of album(s).
Neither does Biggie and most of the albums that dropped in the 90s.
Like Brother Ali said, the 90s may be the golden age of hip hop, but hip hop was also musically weak in that time period.