Jean Pascal vs Bernard Hopkins II - not a typical "classic" but it counts for me due to historical implications and whatnot.
Marquez vs Concepcion
Cordoba vs Dunne
Castillo vs Corrales I
Izzy vs Marquez as a trilogy(TRILOGY! 4th fight doesn't count, I won't accept it. No way. Nuh uh.)
Marquez vs Diaz I
Calderon vs Segura I
Monshipour vs Sithchatchawal
Cotto vs Margarito/Torres
Not really 10, but yeah........
There are other fights like Porpramook vs Yaegashi, Freitas-Barrios, Palacios-Misawa and others that were pretty shitting mental but I doubt they'll be universally recognised as "classics" fights. I'm sure I've neglected obvious ones too, as I tend to do.