No idea for DC

There's most likely around 100 other melee heroes, who can potentially use DC and you can justify using it on a lot of them. So instead of us pointlessly listing heroes and reasons why you could give them DC, you might get better results, if you looked for a few seconds in your barracks and decided yourself, if it's worth it on any of your heroes and then came back with a couple of options that you came up with.

Maybe you have a highly merged hero or maybe you want to make a high merge hero, so investing a lot in them makes sense. Or maybe you have a favorite unit regardless of merges, that you'd like to have DC.

There are so many possible outcomes. You can't really base your question just by asking if there are any good DC heroes.

https://fireemblem.gamepress.gg/q-a/good-users-distant-counter

We get this question at least twice a week. Please accept that I'm not fond of repeating myself that much.