Define "Classical Music" Do you mean like Baroque (Mozart, Beethoven) or Renaissance, or something else.
Renaissance : dominated by Flemish and North French composers :
Guillaume Dufay, Jean d'Ockeghem, Josquin des Prez, Adriaan Willaert, Orlando di Lasso.
Baroque : J.S. Bach/Vivaldi ; Classical : Haydn/Mozart ; Romantic : Van Beethoven, Tchaikovsky, Mahler.
Actually I like all composers of the so called "Iron Repertoire" from 1700-1900. Before and after that, I am a little more critical.