That top 10 is really bad.
@VanDeBank has it right
These should all be Top 10:
87. Ultramagnetic MCs, 'Critical Beatdown' (1988)
79. Eric B. & Rakim, 'Follow the Leader' (1988)
40. Dr. Dre - 'The Chronic' (1992)
24. Nas - 'Illmatic' (1994)
15. Eric B. and Rakim - 'Paid in Full' (1987)
I'd add
Wu Tang Forever (1997)
Don't Sweat the Technique (1992) could replace one of the Eric B and Rakim albums for Top 10
Digable Planets - Reachin'
Bizarre Ryde to the Pharcyde
You could probably move Eminem up (he's better than kanye and jay-z)
Straight Outta Compton should be at least top 25 for sure and a top 10 contender.
Personally, I always felt both Biggy and Tupac were both heavily overrated by media. They really weren't the best of the 90s by any means. Rakim, Nas, Snoop, Wu Tang should all be top 5.
All of them are far better than Biggy or Tupac.
Oh and Gang Starr should be higher plus Jazzmatazz should be top 50.