Television series
That Time I Got Reincarnated as a Slime
This is comfort-food isekai: a mild-mannered salaryman reborn as a gelatinous blob with absurd power discovers that immortality plus telepathy plus a good heart is basically a management job. Rimuru spends less time fighting monsters than negotiating trade routes, housing and citizenship rights for them. It's warm, funny, and weirdly cozy for a show full of dragons and demon lords — a power fantasy that also files paperwork.
If you liked this
Overlord2015
Same overpowered-protagonist-builds-a-kingdom engine, but curdled into something darker and funnier — Ainz is a skeleton lord surrounded by devoted psychopaths, and the show never lets you forget how unsettling that is.
But The comedy is a lot meaner and the protagonist's morality is genuinely ambiguous, not just cute-overpowered.

Log Horizon2013
The purest 'let's build a functioning society from game mechanics' show out there — trade, politics and guild diplomacy handled with the same nerdy delight Slime brings to monster bureaucracy.
But Talkier and slower-paced, more spreadsheet than spectacle; action is sparse.

Kono Subarashii Sekai ni Shukufuku wo!2016
If you loved Slime's comic relief moments, this is basically wall-to-wall isekai parody — useless heroes, a goddess who ruins everything, constant deserved humiliation.
But Zero worldbuilding ambition, pure chaotic comedy — if you liked the nation-building parts of Slime, this skips them entirely.

The wildcard
Something you would not have found on your own.
The Wizard of Oz1939
Same structural engine eighty years earlier — a stranger in a magical land who wins through alliance-building and decency rather than conquest, minus the isekai stat sheet.
The 1939 blueprint for everything Slime is doing: an ordinary person dropped into a strange land who survives less by fighting than by making unlikely friends and negotiating the local politics until she's basically running the place.
But Musical numbers and Technicolor sincerity instead of monster-hierarchy lore; no power fantasy, no fights, just kindness as strategy.

More like this (4)
Mushoku Tensei: Jobless Reincarnation2021
The reincarnation premise played completely straight and serious — gorgeous animation, real emotional stakes, a protagonist actually trying to become a better person this time around.
But Its early episodes handle the protagonist's past-life baggage in ways some viewers find genuinely off-putting.

Dr. Stone2019no page yet
Swap monsters for a petrified apocalypse — same joy of watching a clever, patient protagonist rebuild civilisation from first principles, science instead of slime skills.
But No fantasy element at all — if it's the isekai wish-fulfilment you want, this trades it for hard science.
Parks and Recreation2009
Swap Rimuru's diplomacy with goblins and dwarves for Leslie Knope's diplomacy with a parks department and you get the same pleasure: a decent, tireless leader turning a rag-tag community into something that actually works.
A relentlessly kind, competent leader spends years patiently building infrastructure and goodwill in a town full of difficult personalities — no monsters, but the same warm civic-optimism engine that makes Slime's quieter episodes work.
But Zero fantasy or action whatsoever; the 'adventure' is entirely local government meetings and small-town politics.

Utopia2014
The same premise stripped of magic: strangers thrown together must build laws, trade, housing and trust from nothing. Slime makes it look easy; this is the brutal, funny reminder of how hard that actually is.
Real strangers try to build a self-governing society from scratch on a compound with no rules — watch actual humans fail spectacularly at the exact utopian project Rimuru pulls off effortlessly.
But It's trashy reality television with none of the anime's warmth — petty, mean, occasionally depressing rather than cozy.

People
Cast
Recommended by
Mushoku Tensei: Jobless Reincarnation, Solo Leveling, Overlord, The Eminence in Shadow, Kono Subarashii Sekai ni Shukufuku wo!, Log Horizon, Hataraku Maou-sama!