Neville, 31, said: "Ryan has been an absolutely fantastic player - the best I've ever played with. That's the highest accolade I could ever pay him.
"He's a great lad as well away from football and I rate him even higher than Eric."
Neville, younger brother of United's Gary, added: "Ryan's the best role model for any youngster.
"He deserves being called one of the greatest players United have had."