Hushovd has won at least a stage in the last 6 TDFs he entered. However awfully his season might be going he always brings his A game to the Tour and it would have been interesting to see him figure a way to get yet another stage win.
Menchov was a great rider but even the years he rode to the podium in Paris, his presence was forgettable so definitively not the one I will miss the most.
I would have missed 2005/2006 Basso not riding, 2013 Basso not so much.
Boonen and Cancellara do not have a Tour playing into their strengths, and I won't miss these great champions being reduced to the role of caretakers for Cavendish or worse Schleck. I would rather have them prepare for races that suit them and set up the epic clash on the cobbles that we have been robbed of, these last two years.
Won't miss Wiggins and though I like CAS unique climbing style I am not sure he is in the same league as the other riders mentioned.
Would have loved to see Nibali if it was the main goal of his season but burned out after his Giro win, I don't see him having a huge impact (as in winning/podiuming the GC) if he had elected to race.
I will miss Vino's crazy attacks like everybody else I think but at least he got to retire like a boss after that great Olympic win.