A lot of my favorite ol skoolers have already been mentioned, so I'll try not to repeat any...

How about:
Kwame - Ownlee Eue
L'Trimm - Cars With the Boom
Leaders of the New School - Case of the P.T.A.
Big Daddy Kane - 'Cause I Can Do It Right
Full Force & Samantha Fox - Naughty Girls Need Love Too
Expose - Let Me Be the One; Point of No Return
Nu Shooz - I Can't Wait
Jasmine Guy - Try Me
Jody Watley - Don't You Want Me
The Good Girls - Your Sweetness; Love is Like an Itching...
Today - Him or Me
Mac Band - Roses Are Red
Morris Day & the Time - 777-9311
Riff - White Men Can't Jump
Doc Box and B Fresh - Slow Love
World Class Wrecking Crew - Before You Turn Out the Lights
Cheryl Pepsi Riley - Thanks For My Child