Massive impressive list. Lots of excellent composers/works
Vivaldi-Bach-Telemann-Beethoven-Mozart-Schoenberg-Malher-Rachmaninov-Shostakovich-Dvorak are my pref.
#47 Mozart: Le Testament Symphonique: 39-41 is an excellent springboard for anybody that want to explore classical music as a whole. These last 3 symphonies by the grandmaster are iconic masterpieces, at the same time, accessible and complex. ( Karl Bohm is my fav. Mozart conductor )
Have a great day!