Someone wrote about what would happen if Pogacar competed in Merckx's era and vice versa. If Pogacar was born in Merckx's time, he probably wouldn't even know that cycling existed as a sport, even though he would have been born in Central Europe.
Of course, it's not Merckx's fault that he didn't have stronger competition, but statistically speaking, it is much harder to achieve the kind of results Pogacar has today, given the level of competition and the way he does it. If, in 20 years, another Pogacar is born -someone capable of winning multiple Tours and Monuments while being a top-three favorite in all five ,then, for me, he would statistically be even better than Pogacar And he would't even need to win as much as him.
By the way, wasn't Merckx also caught at "doing stuff ilegally? Doesn't that count as part of his legacy?