I do know Soul Brother - there is a shop down the road from me called crazy Beat which tends to operate the same modus operandi.
In the 80s you used to get Loose Ends, Joyce Sims & Soul II Soul (and even Chas jankel) topping the Billboard R&B charts. Even without US success, there was a buzz around people like Total Contrast that I don't really see with anyone today.
And of the alternatives, there doesn't seem to be much more than background music for bars - nothing that grabs me by the balls.
Nowadays any decent soul vocalist in the UK has to sing over Hed Kandi type records to pay the bills or turn into a cruise ship style crooner like Lemar. Shaun Escoffrey and Terri Walker could and should be stars if Lemar and Amy Winehouse are but when push comes to shove, most of their output just hasn't cut the mustard. And there hasn't been the support there when they have.
Seems to be a Europe wide thing too. Can probably count on one hand the amount of R&B stars from mainland Europe or Australia ever, let alone the last 20 years. Strange as hip hop/house hasn't really had the same trouble.