-Roy
-Askr trio
-Maybe some of the people with only Distant Counter weapons, the somewhat weaker ones
-Corrin
-Sword Eirika
-Lloyd
-Leo
Well, the Flashing Blade effect helps a lot for damage, letting them spam Icebergs/Glacies to make up for mediocre Attack. And remember, they're effective against both Armor AND Cavalry, and there are a decent amount of low-defense Cavaliers to prey on-plus they can counter Mage Cavaliers.