Who is the most versatile rider ?

[Akuryo]

Liege Bastogne Liege? He hasn't won that...

Even if I am on the Kwiatkowski-train for the overall-question, but Nibali came (very) close to winning LBL.

 

[Angliru]

Nibali is my vote.

Does well on the cobbles - Tour '14
Climbs with the climbers (Tour '14)
Time Trials well.
Can hang with the puncheurs (Worlds '13)
Descends with the best
Can win a grand tour or one day classic. (Tour, LBL)
Wins smaller stage races (Tirreno '13)
Does well in bad weather (Tour '14 cobbles stage, Tirreno)

Only thing Valverde beats him in is a sprint.

Valverde beats him in one day races without a doubt. That really shouldn't be disputed based on their performances.

 

[scholar]

What more do you want? He can sprint and he can win solo and win in a TT as well.

Fair point. Yes, I was unfair on Sagan (however much it pains me to admit that).