One trick pony account! Who to choose?

Okay hello guys! Now that season 6 is ending i want to make a new account and try to play only 1 champion on it. I am wondering who should i pick. I need a champ who is low ban rates,low pick rates, high skill cap and can play 2 or more roles. I have played jungle and top allot but i am up for anything. Please help me :) Thanks guys for reading and hopefully answerring for me!
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