I hope the people who are saying Xin are the ones who were actually around when he was released and not just saying Xin because everyone else keeps saying it.
With that said, Vayne.
75% more damage with Tumble, 1.5 second stealth, 10 more damage with Silver Bolts, almost 400~ damage with Condemn combined with the stun, Final Hour gave 35/55/75 AD and Quadrupled her passive, which gave 40 MS, she had 555 range and 310 MS.
Oh the horror of facing off against her my first time.
Noct was pretty bad too on release, W was near impossible to notice when he used it, the tether range on E was longer than flash range, and his ult now was about what TF and Panth's ult range is now. --- PSN: Reventon_3212 ------ League of Legends: m0k3tAl1ty ----- Steam ID: m0k3tAl1ty ----- http://i.imgur.com/zwUzT.jpg
LeBlanc was pretty hilarious on her release, back when all her base damages were much higher and her Q had longer range. That was horrifying.
She was hotfixed later that day I think.
Anyway, Xin on release was insane, LeBlanc was ridiculous too. I remember tower diving 3 people as Vayne on release day. Miss Fortune wasn't too bad when she first came out, but I can't remember if there was any crying or not.
I wasn't around for Twisted Fate. Wish I could've seen it.
Honorable mention, he wasn't OP on release, but they falsely advertised Renekton. Phreak was absolutely destroying teams but I remember forums blowing up about him not doing anything like that; no matter who played him. Riot ended up admitting that they nerfed him BEFORE release. --- PSN: NaRD2ndG | Steam: http://steamcommunity.com/id/nard2ndg | www.twitch.tv/nard2ndg Now streaming: P4: Arena, Bayonetta, League of Legends