Suggestions, please...

Can anyone give me some suggestions for expanding my knowledge of classical music?

I tend to prefer Vivaldi, Mozart, Saint-Saens, Rachmaninoff, Gershwin (I know Rachmaninoff and Gershwin aren't technically "classical"), and some Chopin. I will be up front and say I hate Wagner and Copeland, and am not too keen on Mahler, either. Not much of a Beethoven fan, except for parts of the 7th and 9th.

I am interested in learning works of some other composers, though, so I would appreciate any suggestions.

Thanks