I say either The-Dream wins for his songwriting work for other artists, or R. Kelly wins for having "12 Play," which I say is the best album either of them has put out. R. Kelly also has nostalgia on his side. Gonna have to go with him
You hit it right hurr, I'd say 12 Play pushes it just in favor of Kels. Plus, he's got some longevity. Okay maybe a lot of that longevity is not great but whatevs. Happy People/Step in the Name of Love still gets when I'm drunk and have the right friends over, not sure what that says about me though.
Actually, and I love The-Dream, but damn R. Kelly has like two or three times as many songs I enjoy. So many fucking guilty pleasures, if I actually felt guilty about liking them. I'm pretty sure I could comprise a 2 disc compilation of 30-35 R. Kelly songs that I like/really like/love. So many great remixes too. And guest appearances, holla at Nick Cannon's Gigolo.