(I'm gonna assume you meant Warren not Cooper. If you didn't feel free to send another ask!)

I had to take a minute to think about this ngl.

My initial response was either Halsin or Zevlor but those both have their reasons it wouldn't work I think.

Warren would definitely feel off by the fact Halsin didn't want to put a name to their relationship. I think Warrens past sexual trauma would be a big thing here. He'd worry Halsin was just saying that to sleep with him and having had that in the past he wouldn't go for it. Not to say Halsin would do that but that's how Warren would interpret it.

Zevlor I like because they have the same general concepts backstory wise but I feel Warren would he irritated by how Zevlor handles it so that's a no go.

My final answer is gonna have to be Wyll. Even with Gale Warren has a lot of respect and fondness for Wyll (not in a cheating kinda way. In a best friend kinda way) I think as long as Wyll could see and understand Warrens past with how hurt he got from being apart of the baldurs gate guard and could respect that and not push him to love that city again (which let's be honest Wyll is the type to deeply love his partner. Never pushing them to be uncomfortable or trying to force them into anything) the two would work out really well. I can picture them together and it's adorable.

Can't decide who I want to top tho cause I like the idea of Wyll topping 😏