ANICA lists Rainero De Cenzo as playing "Scopino", which I think it's safe to assume translates as "Sweep" since I didn't see anyone playing a Toilet Brush! If by "Sweep" they mean road sweeper, then he would be the actor in image 1, who is indeed referred to by Sordi as "Scopino". ANICA and IMDb both spell his name Raniero, but in the 3 credited roles below they all spell it as Rainero.
I now have 2 further ID's for De Cenzo, in both of which he is helpfully credited with roles, so we can be sure of the ID's. This ID for De Cenzo is from
Anni difficili (1948), where he is credited as playing Doctor "Rapisarda".
In
La roccia incantata (1949) he plays the role of "The Judge", however the quality of the only copy I found is rather awful, so it is of little help identifying him, though from the profile and hairline I think it is clearly the same actor as above.
We previously failed to identify De Cenzo in our project for
L'oro di Roma, where ANICA lists him as playing the "Chief Rabbi", largely due to the actor playing the sweep in
Mamma mia, che impressione! not matching the most obvious candidate for that role. With the new ID's above I'm not entirely convinced that this is him playing the chief rabbi, but I checked the other old images from
L'oro di Roma and there is no-one else who seems at all like him, so I think it probably must be. He certainly aged a lot in the 12 years between the films.
And so to the reason we're here, the role of the sweep. I'm afraid to say that in my opinion there is no way this man is the same as in any of the images above, the features, particularly the nose, seem completely different. What do others think?