Mr Inbetween is an excellent Aussie show. Haven’t found anything else that captures our culture so well.

Not sure where the bar sits for obscure / under the radar. There’s plenty of more popular shows I normally recommend.

Keeping it less known I guess:

Sense8 - slow start but cool concept

The goes wrong show - brilliant little piece of British theatre humour. Some great recurring gags

And second another commenter’s recommendation of you’re the worst as a good laugh.