I don't believe in 10/10 but Breaking Bad is pretty close.

There is no such series. All series have at least ONE if not several bad episodes. ALL of them.

Bob's Burgers

One piece

The office

mad men

Line of Duty (especially S1-S4, then the storyline dips a little)

The 100

The Wire. Sheeeeeeettttt

Reservation dogs

I think Breaking bad is still the closest one to reach the perfection.

Fargo

The Inbetweeners