Since you are interested in 50 Best Wagner (3 CD set), here is a list of other items that you may find interesting.
Luciano Pavarotti (tenor) with various guests
Pavarotti - The Greatest Hits
[ Decca Music Group / 3 CD - released 27/Jun/2019 ]
The very best of Luciano Pavarotti - the world's greatest tenor. This package includes a 20 page photo booklet.