Best extensive Jazz cd collection to get

Hi,
I really want to cover all the great Jazz artists. I think the best way won't be by buying separate discs, but rather a single big, multi cd collection.
Is there a good cd collection that covers the greats?
I don't want a 4cd collection that covers only the very popular hit. I am looking for a very big collection of the great music of all the greatest Jazz musicians to ever live.
Thanks!