which is the best one for hardcarrying in TOPLANE??

Hello guys, I need a champion as an alternative to Darius, which is banned too often, so that i always end picking maokai, nautilus, singed etc. I was torn between: **Kennen**, **Irelia **and I**llaoi**. Which one is best for carrying in low elo? which is the hardest one to counter when it gets fed? Sorry for my bad English and thanks for the tips.
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