Chaos Centaur is specifically mentioned so it can be hired.
Followers of Chaos include Cult of the Possessed, Carnival of Chaos and any other Cults of Chaos, plus
Beastmen, Marauders of Chaos, Norse, and Chaos Dwarfs. Skaven and Dark Elves are not counted amongst Chaos warbands.
So any hired sword which hiring list include Follower of caos can be hired by beastman warbands.
- Dark Elf apprentice assassin
- Ogre Slaver
- Slaver
Lot of Hired sword can be hired because it list say any warband (and then a few expections):
- Duelist
- Highwayman
- Imperial Assassin
- Nomad Guide
- Ogre Bodyguard
- Pathfinder
- Pit Fighter
- Prospector
- Thief
- Tilean Sharpshooter
- Warlock
- Witch
Some of the choices seems odd, but never understand the stupidness of greedy individuals.
I also used to convert them a little. (Imperial Assassin to Death cult assassin followers of Khorne).
A warlock or a witch who thinks they can tap the Herdstone magical powers...