Well, I am going to give my opinions but I think you have to pick the best lightwalker and the best evil guy. Power for a lightwalker can be a different thing than fir an evil guy.
Anyone who is not lev 50 really cant be considered as they have failed to even master their own professions and prove themselves against all the skilled players.
For a lightwalker, I have to pick Coven. Tough in a pk and one of the better leaders on this mud. Most knights will not even log on unless Coven is there. That alone makes him very influential.
For the bad guys, I pick Orcrist. He fights everyone no matter the odds and never seems to give up. Most guys won't even log on if they see Orcrists name in the "who pk". He walks the walk and talks the talk better than Quazark ever did. I only think that maybe he multi kills too much. I mean, he killed Ammonn four times in one day and i don't know the rp reason behind that. I respect him becuase I have seen him fight a lot of knights and he doesnt quit just cause its three or four against one.