OnlyInCalifornia
Southern California/Vegas
Keith's 1st album was in '87 and has been considered the first NJS album... TR's first big R&B hits 'I Want Her', 'Make It Last Forever' are off that album.
And he didn't have a video really in rotation until the mid 90s (I am agreeing with what you are saying originally)
Far as MTV (and by extension, pop radio, and Billboard) Most R&B for a good part of the 80s/early-90s was put far behind pop and rock music, and I'd say they even put rap in front of it at a point as it was the "new cool thing" for a minute... it was everything to US... but most R&B acts had to go super-pop to get play during those days. It even reflects in the charts- there are songs that were #1 hits on the Billboard R&B charts that weren't #100 on the Billboard Hot 100- because they weren't getting played in those other markets (a direct result of that 'Disco Sucks' movement in '79 which made Black music a pariah... but that's a whole 'nother story). That's why there's a whole world of R&B songs from that era that we love and they don't even know shyt about.
Not disagreeing with all this but in context of what the original point was, MTVs affect on if something was popular or not at the time, if they did not play the videos they just were not popular nationwide and even worldwide in some countries.
As MTV removed time slowly for TV shows and fill ins that usually would go to non mainstream music which pushed out some of the exposure of the artists who would have continued on the New Jack Swing sound.
Ginuwine and Destinys Child went on to win awards and be big, in part of video support, heading into the 2000s.