How about everyone singing "Ombra mai fu" from Handel's Xerxes.
In response to a complaint is this miraculously beautiful rendition by my favorite baritone Dmitri Hvorostovsky.
It transforms into something completely different when he sings it. He doesn't ornament.
Old timers who never ornament:
Jussi Björling who sings it like it was Puccini.
Éva Marton accompanied by harps.
Modern people who don't ornament:
Ornamenters and other free thinkers:
Lorraine Hunt-Lieberson. She ornaments just a bit.
I enjoy the ornamenting, but I don't know if I'd want to grade them.