The best champs not in lane to counter Aurelion Sol include Samira, Kalista, and Jinx. These champs are all good at countering Aurelion Sol with win rates over 55%. Even if these Aurelion Sol counter picks are not chosen in your lane, it's not a good idea to take him into one of these matchups. They will usually win against Aurelion Sol.
Conversely, if the opposing team brings either Ziggs or Quinn, Aurelion Sol mains should strongly consider selecting him, as he easily dominates these selections with win rates over 55% against each ofthem.