In the 1980's, The Jets, Wham!, George Michael, New Edition, New Kids, Five Star, Kylie Minogue, and Tiffany. Also early Madonna and Bananarama.
1990's: Celine Dion and Jewel would be close since both are known for ballads.
Now: nobody
Michelle Branch, Vanessa Carlton, and Alicia Keyes are young female singer/songwriters, but are musically different
The Anti Debs: too long to list, though the majority of today's young pop singers lack or have very little talent and lip synch. Not to mention majority being famous for the sake of being famous rather than focusing on their music/acting.
BTW, I know Deb's unique and one of a kind.
