Sarah & Duck - especially good for quieter creative kids or before bed. Really sweet, softly surreal, and they seem to live in an idyllic communist post-money Britain where things like local musical instrument shops and bakeries exist but you don't have to pay for anything.

Hey Duggee - Lightly educational, colourful short animated episodes littered with cool pop culture references, and the animals are a really diverse bunch (adopted, gay parents, wheelchair users etc) but it's all very natural and inclusive rather than making a big point of it. The songs are good too.

Storybots - The only true successor to Sesame Street as far as I'm concerned. Each episode is a look at how something works guided by very endearing little robots with loads of character and it's great at explaining quite complex science in simple ways. It's full of great songs, meme able animal gifs, and has lots of guest stars like Snoop Dogg as a computer operating system and Ed Norton as a New York corner electronics store owner of impossible to discern national origin.

Bing is good. No cops for sure and only a few mins per episode.

Octonauts is a bit longer and has good messages regarding ecology and marine life.

The Clangers seem to be an anarchist commune of space mice. No cops there.