The 5 tops/large hunter guild:
1. Hunters (first place because they have 2 S-rank Hunters: Choi Jong-in (the GM), and Cha Hae-in (the vice-GM whom YooJin Association Chairman is trying to recruit for Yoojin Guild))
2. White Tiger
3. Fame
3. Fiend
4. Knights (last place because they don't have any S-rank Hunter, but they do have enough A-rank Hunters to keep them in the top 5)
The Chairman is the only S-rank Hunter in HA, plus by how differently Jinwoo reacts to Gun-hee vs how he reacts to Jongin, you could tell that Gun-hee is stronger. That's why HA is still capable of regulating the hunters even with so many strong guilds around. Woo Jin-chul's strength is also near the very top of A-rank. However, the Chairman is old and needed a successor.
As mentioned in the previous chapter, there are 10 S-rank South Korean Hunter.
5 are currently in the top 4 guilds, 1 is retired (Min Byung-gu, another person YooJin is trying to recruit), 1 is sick due to old age (Chairman), 1 recruited to US (the guy from Scavengers), and Jinwoo. Not sure what happens to the last S-rank - either recruited overseas like Hwang Dong-su or died in one of the 3 Jeju Ant raid.