ThisKakashi shouldnt even be in the running along with others. Whilst good its between the 3rd raikage and sasuke.
I judge this based on offence and defence along with raiton feats though the latter isnt much proof because certain characters get more screen time than other's.
When it comes to defence A's raiton along with sasuke's is the best. A's Raiton no Yoroi is arguable the best raiton defence because apart from giving him a form of defence, his evasive power's due to his reflexes in v2 allows him to evade extremely fast attacks. Whilst the 3rd raikage's is durable, its cannon that his durability is from his body rather than his raiton though that aswell will give him a defence boost. Sasuke has developed a similar ability though his is different. Ive noticed that the raikage's Raiton no Yoroi doesnt shock the opponent something that surprises me. Anyway sasuke's defence in Chidori Nagashi though doesnt grant him a speed boost like the Raiton no Yoroi, is one most likely right behind the Raiton no Yoroi when it comes to raiton defences.
When it comes to attack though we haven't seen the 3rd produce the famous Kuroi Kaminari, since its a different form of raiton its bound to be stronger than the ordinary raiton. His famous Jigokuzuki was said to be the strongest sphere. However sasuke's holds the offensive capability in kirin. There is no ration technique stronger than kirin. When its been described as on a totally different level to what human's can create this statement alone puts it above anything the other raiton user's have in their arsenal. Its actually lightning, so its cannon that sasuke holds the strongest raiton technique.
When sasuke holds one of the best raiton defence and the strongest raiton offence he takes the cake.
3rd raikage takes 2nd place. Though his raiton defence isnt as great as his son's his lightning offensive abilities is greater than his sons.
A takes third place. He has the best raiton defence. His offensive abilities when he combines raiton and taijutsu (nintaijutsu) makes him a worthy third.
2. 3rd raikage
Nobody else has the offensive and defensive capabilities as these 3