Greatest Rapper (Solo/Duo/Group) of All Time?

1.Top 3 Greatest 90's/early 00's solo rapper?Favorite song,album.
2.Current favorite rapper?Why.
3.Duo?Favorite song,album.
4.Group?Favorite song,album.
5.What do you think about the new generation of hip-hop/rap?

My Opinion:
Greatest solo rapper:
Big L,Put It On, The Big Picture
2Pac,Only God Can Judge Me,All Eyez On Me
Nas,Affirmative Action,ILLMATIC
(Sorry to the Eminem fans)

2.Current Rapper
Yonas.He's one of the conscious rapper,and I like political hip-hop/rap.

3.Greatest Duo
Black Star (Talib & Mos Def),Re:DEFinition,Mos Def & Talib Kweli are Black Star

4.Greatest Group
The Roots,The Seed 2.0(Perfect Tune),Do You Want More

5.There are many whack rappers and it's kinda hard to find a good/excellent/meaningful song to listen to.