Actually more new fighters today have modeled there career's after GSP than any other GOAT contenders. Fighters like T.Woodly, Aldo, and Kevin Lee to name a few.
Nobody is training to be the next Anderson Silva because his skills and talent were unique, they relied heavily on a good chin, great reflexes, KO power and good speed, these are natural traits that any aspiring MMA'ist will be genetically handicapped from ever achieving.
Jon Jones is a tall fighter, with incredible reach, he uses his physical attributes incredibly well, and it makes him unique in that regard where a very small portion of the population are even capable of emulating him.
GSP is 5'10, between 180-190lbs, hes your every day guy, you dont need natural 1 punch KO power to be him, you dont need to have incredible reflexes, you don't need massive reach advantages, or be incredibly fast.
Thats what makes GSP the GOAT, is he's the guy who accomplished everything through work ethic alone, he's not the best grappler ( leo Santos submitted him in a 1:30 mins in a grappling match), not the best wrestler, not the best striker. He literally doesnt hold a single defining aspect that is superior to all his opponents. But he's mixes it up the best, his "boring" style is understood and copied by Aldo and TWoods because they can appreciate the intelligence behind it.
There is no fighter today who has had as great an impact on future aspiring practioners than GSP, who is the blue print for success in this sport.
Keyboard warriors will continue to disparage him, but its the kids in the gym that will watch GSP, and understand why he's the best, and will forever remain the GOAT because of it.