Moved to a new apartment, found a stray outside. Could anyone home him? More info about the baby in description.

Hello! I found a stray cat outside my new apartments (in Greenwood) almost immediately after moving in. Because of how bad it is outside (it “feels like” -7 right now), I decided to bring him in just until the weather started to get better. Well, he loves it in here. I’ve seriously never had a stray that has adjusted as well to being inside as this one has. The issue is that I have 2 cats that are already on edge as they’re still adjusting themselves to our move, and well, they don’t like this baby. I want to make it clear, *they* don’t like him hahaha. He really wants to be friends with them. He is good with dogs as well, I have a 70-pound, reactive pit bull who the cat will not leave alone. He lays next to (basically on top of) him on the couch, follows him when he gets up, and rubs on him constantly lol. It’s the cutest thing I’ve ever seen. I will try to post some pics & videos of him in the comments if it lets me. I hate that I can’t keep him because he is truly such a good cat. He is male and his ear is clipped, meaning someone took him in as a “community cat” to be neutered. So no future owner will have to worry about getting him fixed! I saw his ear was clipped and was curious if he was someone’s outside cat, so I asked a neighbor if they’ve seen him before & they said he’s been outside here the whole year they’ve lived here. I hate to come here and make him someone else’s problem, but I don’t really know what to do. I have called Johnson County Animal Control and they literally told me to put him back outside :( my heart doesn’t want to do that. So, if you are looking for a good cat to add to your family, or if you even know a rescue that would take him in, please do let me know. This is barely working (for my cats) already, I don’t know how much long