This appeared in my netflix suggestions the other day and it's really quite good.
The show is based just after WW1 with a returning soldier named Thomas and his brothers. They have a gang and run a neighborhood. The filming is done very well with tons of extras which really let you experience the "feeling" of the time period. It's got a pretty fast paced plot, each episode is about 50 minutes each.
Characters are suitable and the research is quite good, for instance they mention rounding up men over 5ft. Not 6ft, 5ft. Which is accurate considering the time period. So you can learn a bit, even from the props they use like the cars. Historical accuracy to some extent which is pretty nice.
Description:
In the aftermath of the Great War, returning soldiers, newly minted revolutions and criminal gangs are fighting for survival in a nation rocked by economic upheaval. One of the most powerful gangs of the time is the Peaky Blinders, run by returning war hero Thomas Shelby and his family. But Thomas has bigger ambitions than just running the streets. When a crate of guns goes missing, he recognizes an opportunity to advance in the world because crime may pay but legitimate business pays better. Trying to rid Britain of its crime is Inspector Chester Campbell, who arrives from Belfast to try to achieve that goal.
The trailer doesn't really do it justice in my opinion, if you want to see what it's like you really need to watch an episode from it first.