deep totem
This is more of something for you to find out, depending on the elo also. Because Yasuo can counter Azir, but in reality, Azir will usually win because of how safe he can play with his Soldiers. On top of Azir's R completely negating his R. But I will say, strong Assassins like Zed should be something to look at when you play Azir, so they should be the ones you should be banning if you struggle with them.
summer urchin
random veldt
brave lagoon