Stumpy and Scarlett share the alpha role in my house (king and queen).
Stumpy always eats first at the food bowl. If he jumps up to eat, others will back away and wait until he is done. If they nudge in, he thwacks them on the head and they back off. If any other cat is at the bowl when Stumpy is not present, more cats will join and they eat in a big circle.
Scarlett is the smallest cat by far (7 pounds), yet NOBODY messes with her - I saw her beat up my 18 pound Tigger one time. I'm not saying this in a bad way, but she is a little prissy, and anyone that gets too close to her is driven away. She allows some cats to come close to her, but only when she wants them there. Poor Sage absolutely loves her and follows her around the house. When she is in a REALLY good mood, she will allow him to come up and lick her head. Most times she just thwacks him away. She allows Steve and I to be her bed, and more often than not will be on top of one of us. We don't dare turn her away.
Stumpy has been ill of late, and I've been watching the household very closely to see who he is handing over his alpha role to. While Spanky, Dakota, and Eight-ball all want the spot, Eight-ball is too grumpy to the other cats, Dakota is simply domineering, but Spanky is a friend to everyone. Stumpy is grooming Spanky for the role. Stumpy has started to allow Spanky to eat with him, and allows Spanky to keep watch over the other cats. We are actually glad that he picked him, as Spanky is a very good cat and I personally would have picked him for that role. But that is not up to me.
And nearly forgot. Stumpy will mount other cats when he is so inclined and mostly picks on Bob. Spanky has started doing this also but does it only to Oscar.