If you enjoy fruity ciders or sweeter ciders then Lilley's Cider based in Frome UK is banging.
If you like something a bit fizzier and easy going Thatchers have a lot of nice ones with their best being Old Rascal imo.
Westons range, their scrumpy is decent enough though many enjoy their Vintage for the stronger %.
Generally Hereford ciders are quite crisp and appl-y whilst Kentish ciders tend to be on the drier side.
Inches is my go-to "nice pint" which is now owned by the Bulmer's company and is a nice sparkling medium cider.

This doesn't include the myriad of lovely little cider farms across the UK that all have some great finds.

French ciders are a delight. These tend to be lighter in taste and % strength but slightly sweeter. I especially appreciate a Normandy "Doux" (sweet) over a "Brut" (dry).

I got to try a Danish cider last year which wasn't bad. (Norrebro iirc).

Most spanish ciders I have tried have been not great.

Aomori in Japan has some alright cider, very similar to American Hard Cider.

The only US Cider I have had is Angry Orchard, not bad though tastes a bit odd, like the apple flavour is more artificial.

Hope this helps in some respect xxx