First off, as you are a new member, welcome to Tropical Fish Keeping forum.
The Hikari pellets are fine. The "tadpole" pellets might be eaten, but I don't know if the nutritional value is suitable for corys. Flake food that sinks will not be sufficient and in my experience corys don't seem too keen on flakes anyway.
Most any good sinking tablet/pellet food for bottom fish will do. You have a veggie one in the Hikari, and veggie foods are good for all fish for the digestive tract; so I would get one or two "meaty" sinking foods. All of my bottom fish, be they catfish or loaches, really go for Nutrafin's sinking tablets. And the shrimp pellets are readily consumed. Of course frozen bloodworms are relished, but only as a treat once or twice weekly.