To continue a bit on my "lists." For about 55 years I have been particularly interest in tenor singing. I think I had a very large collection of recording of great tenors. I have listened to these year after year and in 2001 published my list of my favorites. Really more than my favorites, because I consulted every book I could find on these singers to check to see that others, much more qualified than I, might give me an insight I needed. One caveat: All of these men made recording in the "electrical" era. Many of them were also active in the "acoustic" era. But I do not include on my list singers who recorded ONLY in the acoustic era. Not in order of preference.
Guiseppe de Stefano
I heard in person Bjoerling,Tagliavini,Bergonzi,de Stefano