Ok.. Im going to mark Cadel on five main criteria..
Grand Tours. He hasnt won one, while Contador, Menchov, Valverde, Sastre, Basso, Nibali, Vinoukourov, Di Luca etc all have.
Monuments. He hasnt won one, while the likes of Cavendish, Vinoukourov, Gilbert, Schleck, Ballan, Pozzato, Di Luca have, and the likes of Cancellara, Boonen, Freire, Cunego, Devolder, Valverde have won multiples.
Semi Classics. A sole win in Fleche Wallone
Stage race wins. The Settimana internazionale di Coppi e Bartali in 2008, Tour de Romandie in 2006, Tour of Austria in 2004 and 2001 and the Tour of Tasmania back in the nineties.
World Championships. He has a world championship win.
So on the basis of NO grand tours, NO monuments, 1 semi classic, 5 minor stage race wins in his carerr and a world championship, its a definate NO, CADEL EVANS IS NOT THE GREATEST RIDER OF HIS GENERATION. He would be in the top 10.. probably/possibly, and only there because of his world championship and general consistency, Contador, Cancellara, Boonen, Cavendish, Menchov, Valverde, Cunego, Basso, Baby Schleck, Nibali..oops thats ten, maybe cuddles is 11th..
On your basis Juan Antonio Flecha is one world championship away from being the best rider of his generation