My favorite series is The Royals which abruptly ended at season 4 due to ratings as usual.

The plot twists, story line, characters were done really really well. There was a blend of season actors as well as new actors for this series and everyone did a great job in portraying their characters and personality.

On one hand I'd easily recommend this to people however on the other hand I know it ends at season 4 without a proper ending so..... at your on discretion :D