I only mention Alya, Nino, and Chloe because they already have the closest relationship to Marinette and Adrien in the show. They're a bit of the predictable choice, but then again, they don't require any further development to give an interesting relationship to Marinette/Adrien and Ladybug/Chat. Chloe especially.
On the other hand, we could see one of the other students suddenly getting a bigger focus if they become a Miraculous user. It would require a bit of focus to flesh them out, but they could end up with an interesting interaction in class along with a different situation as a superhero. It's just harder to name someone specifically who would work best for that role.
Also, note that blonde-haired Adrien probably wouldn't be the first choice for a "black cat" character, so don't be too surprised if the Bee user doesn't turn out to be blonde-haired Chloe.>>84058140
Tumblr can be quite annoying, even outside SJWs. Just combine pestering fans with rabid shippers and unlimited access to an ask box and you wouldn't be too surprised by his reaction. Hell, shippers are generally far worse than SJWs.