He's one of the least villainous people from Zaun out of all of the characters classified as "evil" He's at least a better person then Singed or Warwick, but not as much a good person as Ekko or Janna.
Viktor created 
He is definitely evil
I think people have seen the battlecast, and assume Viktor must be evil for making them. But that is an alternate reality version of Viktor who is evil. While we know a key difference is Jayce did not destroy the arcane crystal in the battlecast universe, we have no idea what other differences there may be. We don't know if Viktor would have always fallen if he was given that much power, or if there was another reason for his corruption.
My skin is grey, and I have no eyes/nose? Okay...
#ViktorDidNothingWrong
Well I mean, to be fair, he's trying to change the world for what he considers the betterment. He's at least good in his mind and not chaotic evil.
I think Viktor is more Chaotic Neutral
He wants to evolve mankind to be fused with technology and to become a more superior species... Intellectually.
This being done by a suppression of emotions, or at least 90% of emotions which he deems as a problem.
One must remember that with Viktor, before becoming the man of metal, he wanted to better the world and improve it. His dream being shattered when his credit for Blitzcrank was taken from him.
Probably why he deems emotions useless and a problem.
As for the whole Battlecast AU... We don't know a lot about it. (At least I don't)
Viktor can still be good... He's just too shattered to want to be.
Sigh here it goes again first off Victor is not evil he is simply obsessed with progressed he wants to make life easier and he wants humanity to evolve into something more just because he doesnt try to be all rainbows and sugar pies doesn't make him evil And no he hasn't done anything wrong he is too busy inventing things to make life better.
When you're one of the rare people who know that his lore was changed to make him a cartoon villain and Jayce the handsome hero, feels bad man.
It is a form of immaturity to cling on the thought that what you find to admire is always good.
Coming back to Morde, he is entirely evil and yet you don't see his fans trying to make him the good guy. Viktor wants to robotize everything and every1 out of their free will. "Greater good" or not, imposing your credo on others isn't that good.