What is your criteria for this, exactly?
Single strike ko's are impressive, and Silva had his share as well. That said, in a general response, Silva's domination of Franklin was quite impressive. Franklin was the best in the division at that time without much scrutiny. And when Silva beat him, Franklin became 'the best in the division NOT named Silva" for a while thereafter if I recall. Meaning, there were 2 guys at the top of the division without uncertainty, and there was far too big of a gap between those 2 as well, which is why Franklin had to move on.