Best champ to carry as (Top mid jg adc)

As the title says best champ to carry with im thinking of just maining kat so i can carry myself out of bronze and just go bot and spam my r down there also is akali a good carry there was this akali in my game my ww was like 30/2 or soemthing and she kept killing all of us we won btw but she built 2 tank items and could kill us in like 1-2 seconds litteretly exactly that this was late game so is she a hyper carry or just a good carry also champs that can carry hard name them ty