They ain't gonna like this but it's sunoo lol. He's the quintessential false omega to me. However, I know this is an unpopular opinion, so I'll give you some other options too.

Heeseung: exhibits alpha-like intensity and behaviors. I'd like to see what happens when he gets into an actual serious relationship.

Jake: has the most wolf-like characteristics. It counts for something. I can imagine it.

Niki: now EYE think he's an omega with a glandular problem but i can also see how he's a baby alpha.