Without thinking about it much, my favorite streaming series (non-documentary) of all time have been Tehran (Apple), Bloodline (Netflix), The Queen's Gambit (Netflix), Defending Jacob (Apple), and The Last Thing He Told Me (Apple). The Highwaymen and a western series that I can't remember the name of earned honorable mention. Right now, there is one on Apple that after just two episodes, may join that elite group. Every Wednesday, a new episode of Presumed Innocent is released, and it's fvcking phenomenal. For anybody with Apple or who wants to shell out $6/month, it's a must-watch (again, only two episodes in).
Recently, I've watched Baby Reindeer (Netflix), the documentary How to Rob a Bank (Netflix), A Man in Full (Netflix), and the Ashley Madison documentary (Netflix). All of them are worth watching, but the bank robber documentary is the best of the group.
Any other recent ones that need to be watched?