These guys represents the greatest of our generation. However its no doubt that Grand tours trumps all so in that regard the number one place is easy, Ive never witnessed a more complete GT rider in my life time, at his best could TT with the best in the world and climb like noone before him add that he only got better during a 3 week race duo to his incredible recovery its simply no match and unbeatable. Boonen and Cancellera are also two unique riders which has dominated their areas for ages, incredible strong and rare talents ive comed to rest with that we might not see in sometime. (off note there is this guy called Sagan which also has that unnatural talent and could become this great but his story is still beeing written and its to early to tell if he will get to that lvl or not but he certaintly got the talent for it but it remains to be seen if he can win and dominate as much as these guys did) as for Valverde I feel he falls betwen two chairs standing up against these juggernauts, that is not a dig to Valverde which is a incredible rider of his own but those classics hed won is not so much respected as GT's and the cobbles.
So my list goes as this:
1. Contador - Without a doubt the greatest GT rider of our generation, noone even comes close to challenging him, you could also make the case that hes the best grand tour rider of all time. Not only dominating GT's for over 10 years but also winning GT's grand tours for that long is never been done before by anyone and should speak for itself of how great he is, not even Hinault could manage that, add to it that Contador did it in a time and era that cycling has evolved and is more competetive it only goes to show what a unique talent weve been witnessing. Count yourself lucky to beeing able to seen him makin history, cause it is not very likely you will see someone of his talent dominating GT's for more than 10 years in your lifetime again.
2. Boonen AND Cancellera I cant decide of the two. Unlike Contador which noone even comes close to in GT regards these two actually battled it out against each other and I just cant decide which one I will give the nod of whom is the greatest of them. Their both so unique and talented and won so much, nearly the same amount aswell I feel its impossible to rate the one higher than the other. Extremely talented, strong and above all else which is often forgotten incredible mentall thoughness.
4. Valverde - As stated before I feel against these juggernauts he falls betwen two chairs. Not even close to Contador in GT regards and overshadowned by Boonen and Cancellera for the classics. A good GT rider which is also even better at the classics is very uncommon and it is exactly for this reason Valverde deserves to be mentioned as the 4 best rider of our generation which is by no means something bad if someone believes that.