Best powerfarming champs?

Which champs do u consider the best ones for powerfarming right now in each position? I want to know the best ones in every role unless bot(i consider that bot is in a weird spot rn with ziggs and malzahar in the god tier of adc/supp). Ty in advance :D No need in saying shyv or nasus, i think that they are the 1st champs in which we think when someone asks about powerfarming
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