Thor: Ragnarok — The Hulk, Thor, Valkyrie and Loki are baack in “Thor: Ragnarok”
Herald Photo / Marvel Studios
Thor: Ragnarok — The Hulk, Thor, Valkyrie and Loki are baack in “Thor: Ragnarok” Herald Photo / Marvel Studios

God of Thunder? In “Thor: Ragnarok,” our Asgardian warrior is more like the god of fun ... Der!!

Let that give you some idea of the sense of humor employed in “Thor No. 3,” the best in what has previously been the weakest of the Marvel superhero world’s one-hero movies — which rarely have only one hero these days.

You know how those “Captain America” movies, while very good, feel like “Avengers 2.5” movies? Overstuffed on stars while also introducing new heroes, story bloat can happen.

But in the hands of indie director Taika Waititi, who made his bones on the HBO comedy “Flight of the Conchords,” this is a Marvel movie as intent on busting our guts for two hours as it is on blowing stuff up.

It’s still a showcase of action and adventure, and it still has a couple of Marvel favorites who tag along.

But Doctor Strange makes only a tiny cameo and the Hulk, well, he apparently can be added to any Marvel film and make it better.

While trailers have made it look like “Ragnarok” might be “Thor and Hulk’s Excellent Adventure,” that’s not accurate because almost everyone gets to join in on the fun here.

The notable exception, and the great weakness of the film, is the underdevelopment of the film’s villain played by Cate Blanchett — the MCU’s first female in that role.

She quickly establishes that she’s more powerful than Thor and spends the rest of the film making threats and committing mass killings on Asgard, the Norse home of the gods, while disappearing for 30 minutes at a time.

Her character is so simplistic that she gets lost — Hela wants to destroy Asgard and has no other personality dynamic — and this allows Thor to leave Asgard looking for help to take her down.

That puts him interacting with not only his bad-boy brother Loki, but also a variety of characters on another world.

A planet that is largely a landfill with Jetsons-looking buildings rising high above provides most of these people, and Tessa Thompson makes the most of her best role since breaking out in “Creed” as Valkyrie, a scrounger and former Asgardian warrior looking for revenge.

Growing out of this is one of the film’s best concepts in the “revengers” team of her with Thor and Hulk, who spends more time as Hulk than as Mark Ruffalo’s scientist Bruce Banner, who downsizes into a Duran Duran “Rio” album T-shirt.

Yes, that’s amusing, and it’s a perfect fit in a film that never misses a chance for a sight gag.

Thor has never been more clumsy, patronized and beaten up, with as many mishap moments as those of heroism, and all to comedic effect.

But there’s more beyond Chris Hemsworth, who long ago established his prowess with the physicality of Thor and whose comedy chops have only gotten better.

The star and the filmmakers are in concert with the idea that while the action revolves around Thor’s journey to save Asgard, each of about a dozen top characters gets their moments to shine and to make people laugh.

Nobody looks to be having more fun than Jeff Goldblum’s fanciful garbage-planet monarch, who steals scenes repeatedly.

There’s not a great deal of depth to the save-Asgard narrative beyond briefly touching on ideas of fathers and children and passing-the-torch stuff we’ve witnessed previously.

The film does nudge along the Marvel Cinematic Universe future but only in the final moments and in one of two post-credits scenes that inch us toward next summer’s third “Avengers” movie.

But “Thor: Ragnarok” is no slave to the MCU playbook, which allows it more freedom to entertain in a laugh-filled outer-space excellent adventure.