Eh why not?
Man U-- Evans, O'Shea, Neville
Liverpool--Arbeloa, Aurelio
Chelsea--Bosingwa
All these teams have some not so "world-class" names but they certainly have world-class defences. What is more important is organisation and discipline. I will put the recent losses down to poor concentration(Buffon effect?). How about Ariaudo? Ferguson put his faith on Evans and he has played well so far.
What the hell are you talking about man?
You've listed 2 players in o'shea and evans who arent even in the first team and wrongly listen neville as crap, neville is a really good consistqant player. Man U's Defence is individually world class: Vidic: WC, Ferdinand: WC, Neville: WC, Evra: WC. They also have really good depth in o'shea, evans and brown, all of whom i would happily have in our squad.
Liverpool have world class defenders, Carragher is a beast, as are skrtel and agger, Hypia is solid but their fullbacks are pretty average.
Chelsea have even more WC defenders, Bosingwa is WC, Terry: WC, Carvalho: WC, Cole: WC, alex is good, ivanovic is very good.
You clearly have no idea what your tallking about saying these teams dont have WC individuals