OT3???? 👀👀👀 IN DC ONLY!!
I have... I have so many.
In no particular order:
JoyFire, aka Jason Todd and his emotional support redheads
Specifically from Tynion's run on Outlaws. I just love Roy being so open and vulnerable with these two people who he loves more than anything. Being open and vulnerable about these two. And it isn't Blink And You'll Miss It kind of stuff, either.
The entire initial Outlaws series is about three people who need each other and openly love each other.
And one horny sub who desperately wants to get tag teamed by the other two.
Young Just Us Boys aka Team Mom/Team Dad/Team Baby
While I ship KonBart and TimKon a bit more than the three of them, these boys are a set, and they should not be separated. Just like... For everyone's well being, to be honest. I also HC Bart as Ace, so I see it as Tim and Conner making out on the couch while Bart plays video games until they're ready for snuggle time and snacks.
Conner is Team Mom, if that wasn't obvious
Challengers From Beyond, aka Donna Troy and the pain in the ass adventure with her ex-boyfriend and her best friend's baby brother who seriously just need to fuck and get it over with already
Animosity breeds sexual tension. Jason and Kyle are like one snarky comment away from making out against a grubby alley wall, and Donna is the only thing keeping them moving in vaguely the right direction.
Plus, they're pretty.
Batgirls aka Black, Blue, and Purple aka We Don't Need No Boys
Cass Cain, Harper Row, and Steph Brown. They are another group who are definitely a set who should not be separated. They don't get nearly enough love, and I'm surprised Harper wasn't included in the Batgirls comic.
Plus look at how good Steph would look with her dapper, tuxedo wearing girlfriends!