Re: Who was the best lightning release (raiton) user?
Hmm, this is a hard question indeed.
You have to remember that just because one has a strongest Lightning based attacked doesn't mean to say he's the best in a sense, Other's may not have the chakra to waste on Lighting Armour like the 3rd & 4th raikage, does that mean that aren't as sufficient at using it... I wouldn't think so.
I believe that sasuke has shown great skill in term's of Lighting Style attack's, However kakashi was the one who invented the Chidori and has shown great feat's also, like the lighting clone and such.
It's a hard one to say, Because the 3rd raikage has shown great manipulating on the lighting chakra like when he points it at his finger tips,
however sasuke has shown to same thing of attack himself.
It's hard to say.