What are examples of real rap songs?

[SlimShady]

I don't want people to say like 50 cent, lil wayne, snoop dogg. Looking more towards old school rap and gangster rap.

 

[GivemeTRUTH]

anything by Dr Dre

 

[Daigoro]

going by your name, you dont deserve to know.

 

[SamuelP]

Mobb Deep- Survival of the Fittest
http://www.youtube.com/watch?v=GG6TWB8aebY

Mobb Deep - Shook Ones PtII
http://www.youtube.com/watch?v=UeuEGr_UTzg&feature=related

Nas - Ether
http://www.youtube.com/watch?v=0ePQKD9iBfU

Nas - Made You Look Remix (and orighinal)
http://www.youtube.com/watch?v=LKbaORyjg_s