So the only creatures you can capture are the regular werwolves Werrats And lizard men
The acception is during some quests you can capture either werwolf bernard or logan when yiu go to save or cure them then theres roushk and rout if you corrupt the lizardmen tribe
Im right there with you but sadly its not possible yet though for tge alpha werwolf i doubt there will be causs he provides materials tgat you cant get anywhere else but there could be a possibility of lures for regular wolves
Actually it could still work cause if he's at home you can just have fun to gain the item. It also makes it more convenient for the player because it removed the fight aspect! Also you can release prisoners so if you need to fight him you can always release him.