By your standards, Ngannou in no way dominated many of his opponents since he "landy one kind of lucky punch behind the ear," to get the finish. So, what exactly is your standard for determining which fight was more dominant? I think the win Stipe has over Ngannou and the win Ngannou has over Stipe are quite equal because both were as dominant as it can get for what each bring to the table. Stipe was able to outstrike Ngannou, take him down at will and keep him there for all five rounds. Ngannou was able to defend the takedown attempt and fully impose his gameplan on Stipe and finishing him.