Television

• Odyssey 5 (Only lasted a season, but damn...)

• Boardwalk Empire (for some reason the least talked about and most forgotten HBO show)

• Into the Badlands (Deserved a longer life. Great martial arts action in a post-apocalypse)

• First Wave (Nostrodamus, Conspiracy theories and the first wave of an secret Alien invasion)

• Seven Days (The younger lapaglia brother jumps back in time 7 days to prevent various threats)

• Sense8 (strangers from all over the world find themselves linked mentally for some reason)

"On The Air"

Haven't seen these mentioned yet:

Fringe

Killjoys

The Patriot on amazon is one of my favourite tv shows of all time. Tragically cancelled but each episode is outstanding. Nobody's seen it!

Halt and Catch Fire

Corner Gas, brilliant comedy about a tiny Saskatchewan town set around a gas station that is connected to a diner and the oddball people that live there.

You'll come for the quaint setting, stay for the Jackass screaming Oscar.

Kim's Convenience

ZeroZeroZero is a great crime mini series about the drugs trade. Stellar cast.

There have been a veritable ton of amazing shows from Adult Swim that flew under the radar. My three favorite are:

• Dream Corp LLC
• Your Pretty Face is Going to Hell
• The Heart, She Holler

Danger 5. Greatest Australian comedy of all time. https://youtu.be/0Z09bNgSeMI

I did not see Herman's Head mentioned. I've only met one other person that remembers it. Not great in a change-your-doors-of-perception for life, but a fun sitcom from the early '90s.

These don’t seem obscure to me but most folks I know have never heard of them:

What We Do in the Shadows

Sealab 2021

Parks and Rec

Party Down

Freaks and Geeks

Venture Bros

The Lost Room.

Not sure where you can find it, though.

Lots of great classic recs here.

I'm gonna just add two that are relatively recent.

The Last Man On Earth AP Bio

Reaper was a really brilliant, easy-watching action/comedy show akin to Chuck. It's centered around a young man whose family has sold his soul to the devil, and now he must fulfill the contract by hunting down souls that have escaped from hell.

It features the typical "monster of the week" premise, along with a longer story arc across the seasons and has a rather fun mythology and world building. Ray Wise puts in a phenomenal performance as the devil, and I remember the show having a pretty genuine and surprisingly wholesome sense of humour.

Sadly its momentum got interrupted by the writers strike, and its second season was shortened and then cancelled. I still highly recommend it.

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.

Wonderfalls

You're The Worst

-- A dark comedy / romantic comedy that centers on two toxic, self-destructive people who fall in love and attempt a relationship. --

Absolutely amazing TV show by Stephen Falk. Criminally underrated. It is my favorite show of all time. It should be available to stream on Hulu, otherwise pirating it may be the only way to watch it.

https://m.imdb.com/title/tt3228420/

Kipo and the Age of Wonderbeasts

-- A bright, wonderful and adorable show (animated by Dreamworks) that follows 13-year-old Kipo navigating a post-apocalyptic world full of evolved animals with human-level intelligence, and making friends along the way. --

This is a family-friendly show that took me about 7 episodes to get hooked. I am so glad I stuck with it! Made by Radford Sechrist and Bill Wolkoff. It's on Netflix. It also had a small DVD release that may be difficult to find.

https://m.imdb.com/title/tt10482560/

I’m not sure if it is obscure, but I had never heard of it. Husband and I have been watching SyFy’s Channel Zero and love it.

Swarm. It's a great show but unpopular for a reason since it's pretty niche and I imagine would make most people too uncomfortable. That's my endorsement.

Coming to this late, but both Chris Elliott comedy vehicles that tickle me to this day:

Get A Life

Eagleheart

Sliders

Lexx, a show about a giant dragonfly spaceship that destroys planets and the creepy cowardly idiot who somehow lucked into becoming the single person in the two universes that it obeys. And an undead assassin-warrior-poet. And a woman who survived a botched "love slave" transformation. And a weird robot head.

It's outrageously strange and strangely horny and hornily gross. Highly recommend if you like weird TV.

I always mention this one, but The Adventures of Brisco County, Jr.

It's got Bruce Campbell in it (Army of darkness) And he plays a cowboy as the lead character where he goes on wacky steampunk-filled hijinks and adventures through the Old West.

it came out in the early 90s and you can watch it for free on tubiTV.

Fun fact, a lot of the old timey western movies used a particular set and the Adventures of Brisco County Jr. was the last show to use that set.

When they finished it was torn down.

Another fun fact, you've heard the theme song.

It's now used in the Olympics when America plays.

It's a fucking amazing show.

I didn’t see these:
Halt and Catch Fire (AMC)
For all Man Kind (Apple TV)

The 7 Lives of Léa

Interesting French Netflix mini-series. Way better than it has any right to be considering its scale and I don't think it's gotten the attention it deserves.

I recommend watching in French with subtitles.

Pushing Daisies

Spaced

Early Simon Pegg / Nick Frost / Edgar Wright collaboration, sitcom style.