Wikipedia says
A superhero or superheroine is a stock character that typically possesses superpowers, abilities beyond those of ordinary people, and fits the role of the hero, typically using their powers to help the world become a better place, or dedicating themselves to protecting the public and fighting crime.
So yes, he is definitely dedicated to protecting the public, but it feels wrong to call him a super hero. What do you think?
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.
Green Lanterns are space paladins. They aren’t magical themselves but are selected by, dedicated to, and empowered by godlike being that predate the current multiverse.
I’m not using DnD terminology necessarily, but sure. Though I’d argue their melee is largely non-existent, and is completely “magical” in nature. Without the aid of a “spell”, a Lantern can be killed with a butter knife. That’s a more wizardish trait. Faith is also irrelevant from a mechanical standpoint. Magic is magic, doesn’t really matter where you got it from. That part is just flavor text.