I consider Edgar the most underdoggy... but some clarity. I am a Hardy fan first of all. Secondly, why is Hardy considered to have KO power? Hes had one knockout in 4 UFC fights. He wobbled Davis and Swick at most. He does seem to have a lot of power in his short punches, so wobbling fighters and the swarming all over them is his best shot... something he failed to do against Swick.
I like his style to be honest. Short sharp punches that fecking hurt and that dont expose him to too much danger. Not a knockout artist for sure, but a powerful striker nevertheless.
I have become a fan of hardy as well. I say he has KO power by how he hits and how his opponents react. He's clipping guys that have never been KO'd and dropping them without getting near 100% power. I mean the guy only has 12 t(ko)s but I feel he could have finished either swick or davis if he hadn't played it so safe. I'd say he could be considered a knockout artist because 50% of his wins have come by tko/ko.
Where as edgar.. The guy has never ko'd anyone. His last tko win was 3 years ago, and was due to overwhelming strikes he wasn't putting the guy down or anything. Hardy puts down guys with good chins and good striking.