He's a radicalized terrorist, technically.

Yes, in the same way a tomato is a fruit.

Star Wars is a mash-up of Sci-Fi and Fantasy - Luke isn't a superhero, he's a wizard (in the same you wouldn't call Gandalf a superhero).

It's literally this: https://en.wikipedia.org/wiki/The_Hero_with_a_Thousand_Faces

The vast majority of stories with a heroic protagonist will be a variation of this idea.

It's just a step removed. He's from an order of space wizards basically, similarly to how Harry Potter hails from an order for regular wizards. Both groups tend to qualify as superheroes for the most part, but are usually referred to by the subgroup, as opposed to the more general categorization.

Another more traditional, yet similar example, would be the Green Lanterns or Marvel's wizards. Space wizards and regular wizards respectively, but clearly superheroes due to hailing from well-known purveyors of superhero media. Structurally and mechanically similar, though.

No, he's more like a wizard. Other force-users exist in his universe, he just happens to be an especially good one.

Superhero? To us, sure. No doubt at all, no one in our reality has those powers and they're quite novel to us.

To the people from his own fictional universe? Not really a superhero at all... part of the superhero mythos is defined by a use of ultra-rare, exceptional powers.

But at points in the SW timeline before the time in which the movies were set, there were tens of thousands of Jedi running around and doing similar things. They were not exactly "unicorn rare."

Sure he is. The Jedi posses powers normal people don't.

I would say no, only because he does it all in his own name. One of the key features of a superhero is the idea of separation of identity, which Grandmaster Skywalker* does not do. Not all superheroes wear masks, but even the ones that don't usually have some form of alternate identity. (Reed Richards, for example; everybody knows who he is, but it would be weird to call him by his real name while he's in costume.) I would say that Luke Skywalker is a hero, but not a _super_hero, specifically because he does not present himself as such.

*Grandmaster Skywalker, founder of the Yavin IV Praxeum, etc. etc. Fuck MouseWars.

He does not have a fancy logo nor a secret identity. Well. By this definition you cannot call Tony Stark a Superhero, neither Thor.

I would say, Jedi are wizards, in a way where Star Wars is more fantasy than SciFi.

The question is if Jesus is a superhero, since Luke is basically Space Jesus

I feel like superheroes have a plot constancy that forces them to stay superheroes. Their superpowers may lapse, but they generally get them back and feel justified in using them. Their main villains may fall or seemingly reform in one episode or series, but usually return as bad as ever. In Legends, Luke's fight with the Empire is almost over before it has begun. Cleaning up the Remnant and warlords falls to regular X-wing pilots and commandos in the New Republic era. Luke is more of a mediator than a fighter and mostly withdraws from heavy use of the Force by the New Jedi Order era. Even the new enemies of that era don't stay enemies forever. Instead of forcing constancy, Legends allows conflicts in these eras to be "solved" and to permanently change characters.

I mean, he doesn't follow the trappings of a comic book super hero (don't @ me about Star Wars comics). He has all the powers and motivations of a super hero though. At the end of the day, Iron Man is just a rich guy, what makes him a super hero is the framing of his media.

Why wouldn't he be?

Is a Lensman a superhero?

I do think there's a good amount of characters who you don't think of as "superheroes" but really are...but I don't think Skywalker is one of them. His skills aren't rare, he's just one of the best, and his motivations are more that of a freedom fighter/terrorist (the difference is perspective) than a peacekeeper (I actually would argue that a superhero could be a freedom fighter, but most are peacekeepers.)

Green Lantern isn't a superhero then?

Green Lantern isn't a superhero then?

Nope.

Super-creeps exist in a specific universe where super-creeps make sense... ie, a world in which a billionaire can dress up in over-priced BDSM gear, beat marginalized people to death and be considered a "hero" for doing so. It's a very Randian universe... and it stinks.