With just one picture, we should be able to identify the character (the singer will be a bonus, but it's not necessary).
This one is easy, to start with:
Which is this character?
Yes, it was the great Tito Schipa.
Put one of yours, Aramis, if you want, or I proceed with a second one.
Yes, Duke of Mantova, Jan Kiepura in the Met (30's).
Those Albanians Ferrando and Guglielmo?
If I'm right, someone else pick a photo to keep it going.
No, they are not Albanians.
Rather, they were first supposed to be Mexicans, but then it was decided to make them Asians...
They are, those are Enrico Caruso and Giuseppe de Luca in a 1916 MET production, sung in Italian as I pescatori di perle.
Indeed, this is Argentinian tenor Josť Cura.