Dont be stupid.
Do you not understand the concept of riding in front? Chavanel may have been out a bit longer but it was Cancellara doing all the work. He followed Cancellara and that makes him the strongest
Boonen also followed Canc easily in 2010 right up until the moment Canc decided to drop him does that mean Boonen was the strongest in RVV 2010
GEL also managed to follow Canc once Cancellara caught him, when even T Martin lost 3 minutes in Mendrisio. Should Larsson have been given the stripes? Afterall he did follow Canc after being caught, just like Chav.
Riding someone of your wheel may be a good idea when going up the Mortirolo but its not the same in classics because there is too much flat. Its usually an attack that wins it. You arent going to ride someone of your wheel when your on flats and you dont even care about them but are just trying to increase distance to the pack.
Lets also not forget how Canc managed to find an attack out of knowhere at the end, even after cracking which got Chave his podium rather than 5th place.