Not sure who is streaming them but would recommend the following:
Romanzo Criminale
Suburra : Blood on Rome
The Mayor of Kingstown
Spiral (might still be on the BBC iPlayer)
The Bureau (French spy series that is far superior to Slow Horses)
The first season of 4 Blocks was pretty good, though I am less impressed with Season 2.
A Swedish series called Caliphate is, I think, on Netflix. It’s been highly acclaimed and portrays ISIS accurately but does so without resorting to the one-dimensional stereotyping of its Muslim characters.