Some nice, smooth, consistent quality. Better Call Saul was in my opinion pretty consistent. Single season anime is almost always consistent, like My Dress-Up Darling or Terror in Resonance.
Not dragging on longer than the series needs to seems to be a key point.
Barry is an amazing dark comedy series directed by Bill Hader and it keeps going strong 4 seasons in. Huge recommend.
I can’t believe nobody has mentioned The Good Place yet. Solid from tip to tail with some amazing twists and not a single arc. Also they really stick the ending. If you haven’t seen it yet I’m jealous.
The Melancholy Of Haruhi Suzumiya.
I, Claudius is perfect television from start to finish but I dunno if it counts since it was a major production with a bunch of the best actors of all time in it.
Some old ones from Amazon, when it was good :
Halt and catch fire Mr robot Red Oaks
Random others
Vice the deuce Line of duty Responder Tabboo North water
Some are mini series .