Most groovin Rap/R&B basslines?

[pretaanluxis]

Forgive me if this has been done but I did a quick search and didn't find anything.

I don't listen to much rap/r&b at all, but have found that the genre has some really groovy bass. Please recommend specific songs! It doesn't matter if the bass is simple/loop'd, just make sure it's got groove.

e.g.:
Methodman/Redman-Rappers Delight
G.Unit-Wanna Get To Know You
Dr.DRE-let me ride
2pac-Live and Die In L.A.
2pac-Picture Me Rollin
The Roots-Proceed
The Roots-Mellow My Man
The Roots-Love of My Life

[markjazzbassist]

+1 on those roots jams.

i also like

otherside of the game - erykah badu
bag lady - erykah badu
bravebird - amel larrieux
brown sugar - d'angelo
spanish joint - d'angelo
chicken grease - d'angelo
till i get to you - nikka costa
the way i feel - remy shand
family reunion - jill scott
dust - van hunt
character - van hunt
down here (in hell) - van hunt