cube is really good just check these lyrics from thousands of great ones
"while you day dreamin bout the future muthphaka come around the corner and shoot ya, dont ya get stuck in netrual put ya shit in drive while you alive" -tommorrow
"Tomorrow that shit never come i know it sounds strange but today is never done" -tommorrow
"see me with a water bottle is probably vodka, drink responsibly or drink constintly, be who you wanna be in this ecomomy"- no country for young men
"you can go be a pimp, you can go be a hoe, but you only gonna get paid for what you know, if you dont know shit then you cant work for me cuz you read ur first book in tha penetentary"- hood mentality
-just to show you not all rapper rap only about bitches cars and money(of course they do cuz thats where its all n who doesnt but other shit matters too.)
those are from resent songs (if i talk about classic then i need pages)