The Ultimate Serious Nessun Dorma Comparison

The "serious" in the title refers to singers who have sung the role of Calaf (from Turandot) successfully on stage, and often regularly. I have taken different sections from Nessun Dorma for each singer, along with the high B ending. Singers are arranged from oldest era, beginning in the 1920's until the today:

00:00 Intro
00:04 Francesco Merli
01:09 Antonio Cortis
02:38 Aureliano Pertile
03:49 Giacomo Lauri Volpi
05:15 Helge Rosvaenge
06:47 Giovanni Martinelli live
08:09 Mario Filippeschi
09:38 Mario Del Monaco
11:14 Franco Corelli live
12:42 Richard Tucker
14:08 Giuseppe Giacomini live
15:38 Franco Bonisolli live
17:06 Martin Muehle live