A 'Trend Setter' would be the source of that influence; the movement or artist who started it all.
Dr Dre has been and still continues to be a trend setter in this producing industry.
Whats on the mind of a trend setter on rap music?
Joe: I'm sick.
Josh: I was sick first. Trend setter!
Joe: I failed that test and now I'm gonna fail out of the class!
Josh: I failed out of that class last semester. Trend setter!
Non-Trend Setters:Boooooooooooring Today
Trend Setter:Look at this Soulja boy shirt
Non-trend setters:WOOOOOOOOOOOOOOO. It won't be boring if its something cool, like your shirt now, keep up the cool shirts. Tomorrow