Best champions to climb out of bronze with ? :)

I am normally a good support but its hard to play in bronze league with a support because you are stuck with bad players/trolls so is there any champions i can do a heavy carry with in my games to make my way out of bronze 5 , because every time i manage to get to my promotional games i keep losing them due to bad team mates or 10x better other players on the other team. I need to know a good champion that will help me get out
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