Another recommendation for Orphan Black on BBC America (also on Amazon Prime and a few other places) - a great show that blends sci-fi, mystery, action, and an amazing actress in the lead(s) role. No, not a typo! It's final (fifth) season starts in June, so plenty of time to catch up.
Game of Thrones on HBO is also exceptional, and has been mentioned many times.
Not sure if anyone has mentioned The Americans on FX.
And I agree, Fargo on FX is always a good time.
As for comedies, Silicon Valley on HBO is top notch as is Catastrophe on Amazon.
And since no one, probably on purpose, has mentioned any reality shows, two worth watching (I can't stand most of them) are Shark Tank on ABC and Master Chef Junior on Fox.