Here, at least according to Classical CD Guide, is a listing of the classical world’s Sgt. Pepper’s, The Wall and Tapestry.
In other words, it’s the ten disks a beginner should buy right off the bat. On the list are two Beethovens, Mozart, Bach, Brahms, Stravinsky, Schubert, Tchaikovsky, Haydn and Bizet. Each links to a review. I’d figure there are a lot of thumbs-up.