Since when is Chase normal? Being less crazy than the others doesn't make him normal. In some aspects he is even worse, since he knows what he is doing.
Kid Chase you saw in the flashbacks is not adult Chase, the moment he manifested as a dominant alpha he wasn't normal anymore, he was just lucky that it was later than the others.
Keith Pittman is probably one of the most normal dominant alpha, and he has anger issues.

What with the miller family...chase is the only normal shit that came out of that hole