I have been following pro cycling since 1997. Tbh, there were only few riders about which I thought, „WTF?!“… I would say these were Pantani, Armstrong, Boonen, Rasmussen, later Sagan, and nowadays WVA, MVDP and Pogacar.
Pozzato and Ballan were big champions. Both were a bit underestimated. Pozzato was fast and even more stylish, whereas Ballan was fast, but looked fragile.
I would say Pogacar is Lance 2.0, and WVA and MVDP are Sagan 2.0.
I always thought Wout was a little bit weaker than Mathieu, but I think nowadays they are equally strong. These two look and ride so powerfully, race the whole year, perform in every race they start, and perform on every terrain. I wasn‘t born when Merckx raced, but in these 25 years I mentioned, WVA and MVDP and Pogacar have been the most impressive riders, IMHO.