Here’s an album to start with for each:

Nas - Illmatic

Black Thought - Cheat Codes (also check out The Roots, he’s the MC and they’re a hip hop band)

Big Pun - Capital Punishment

Sean Price - Monkey Barz (also check out his group Heltah Skeltah)

Breeze Brewin - Clear Blue Skies (by his group The Juggaknots)