TL;DR
are the pretty boys.
can fit with some work.

can fit with a lot of work
Taric IS NOT A PRETTY BOY. And he would never fit in a 'boy band'.
I don't understand why so many people seem to think the guy would fit as a freaking eboy.
And the thing about Kai'Sa is they made it work- by making her a foreigner. That's her gimmick in the band lore.
This game actually has a very limited number of pretty boys. Pretty boys have a specific body type and facial type.
- The pretty boy king, who was based off anime from the beginning.
Beyond him we have
- When his hood is down, the guy is the second prettiest boy character after Ezreal himself.
Seen here in his old splash.
-Outside of his base skin, he's pretty much always depicted as a pretty teenage boy when his face is shown, easily the third most bishonen character.
For instance SSW, ES, and DB.
- He, excluding literal children, is the youngest male character in the game at only 17. He fits by default.
Those are the four most suited to the 'pretty boy' role.
Then there are the ones with the proper body shape to have pretty boy skins made for them, even if personality-wise and style wise they don't fit.
- Kayn is not quite a pretty boy, but he could easily fit into the role with minimal design changes.
- Yeah, TF. If he cleaned himself up and shaved, basically had a style overhaul, the guy could definitely look like a pretty boy. He has a slender frame fit for the role.
- Viktor is the nerd to Jayce's jock, Jayce is a tough guy type with a broad build, Viktor is the opposite. Though he'd need a lot more changes than Tobias.
- Varus is very much like Kayn here. He is literally made up of two pretty boys so it makes sense.
Vlad, despite his ugly af model, could also easily become a pretty boy, and has actually done so for the Academy line: See?
Then you have the guys who, despite being attractive, aren't really 'pretty boys'. They're more jocky.
- He is at the border of this category, moreso due to his personality than his build.
- Also at the border.
- Along with Shen, maskless art has shown us he could potentially fit into a pretty boy role.
- Same with Zed.
- As Young Ryze shows he is at the border with them in pretty boy potential.
- Remove the charred corpse aspect and Brand could definitely look like a pretty boy.
- Lucian is definitely attractive. Saying otherwise is honestly just trying to go against convention, even if he isn't your type, but he's not a pretty boy.
- Jayce could easily be fit into a more boyish role, as his Battle Academia skin shows here.
But as his debonair skin shows, he definitely isn't a pretty boy. And the Battle Academia skin even has him in the 'cool best friend' role to Ezreal's own pretty boy.
Draven, like Rakan is on the border here, but he's on the opposite border, he could probably be made to work as a pretty boy, but it would be really jarring, and not feel natural.
Now we get to the, and I hate myself for using this, please suggest a better category name, 'daddies'.🤮
Not elaborating, because, well, no, I'm staying away from this category.
Then we get to the really buff guys, outright body builders, despite their attractiveness.
- Shoulders.
- Shoulders.
- Shoulders.
- Actually at the border. He is, and again I hate saying this, a borderline 'daddy'. 🤮