I struggle to think of anything. Maybe chadness breeds straightness (albeit with some homosexual tendencies), or gayness removes the very need for chadness.

I read a few texts by people in which they defended Chads, saying that these highly attractive guys weren't actually bad guys, they were just more attractive and more successful with women, but were also quite likely as a result to be a great wingman, and a guy who's great fun in general. Makes sense, when something is not nearly as scarce for you as it is for others, why not help the people around you to get more of that resource?

I'd like to think gay chads are just like that. Jocks, socially skilled, highly attractive, engaged with sports and just happen to be gay. Exactly what I think of when I hear the term "gaybro" (regardless of how much it's like the similarly called communities). After all, if someone is gay and attractive, the dating environment may well stop to look like a competition so much as an environment with an abundant resource.

But to get back to the beginning of this comment, maybe there's no equivalent and they just don't exist.

It really just depends on what you even define to be a straight Chad. Without a definition, no one's wrong.