-Atk Hardin

I drew the exact same Hardin earlier today!
Was initially a little disappointed, but cheered up after watching him nonchalantly smack down everyone who had the guts to approach - Reds, Blues and even some Greens.
Golly, and I haven't even equipped any skills on him yet...

There are several insightful suggestions here that you might find helpful :)
https://fireemblem.gamepress.gg/q-a/atk-res-hardin

There is also the option of feeding him to BK to make the ultimate monster.
https://www.youtube.com/watch?v=YzOng49GpEw

I got the same one lol, I just gave him a +3 Atk seal and called it a day