In reply to Jay.

I don’t know where you’ve been, but Usher has definitely been considered the King Of R&B especially in the 2000s as he was the biggest male R&B act of the decade. He was labeled as the King Of R&B before Chris Brown because Usher opened the door for Chris. Most people list goes like this in order of King Od R&B

Bobby Brown - R.Kelly - Usher - Chris Brown