It has been a while since I watched it so I’m not really sure how well it holds up but I remember 91 Days being pretty dope. It’s a mafia story about MC infiltrating a group responsible for the death of his family, set during the prohibition era in the US. It’s a short watch (12 episodes or so) too.

I don’t think it is purely recency bias when I say Oshi no Ko.

I also remember revenge being a recurring theme in Naruto, but I would be hesitant to call it a revenge anime.

Kill la Kill

These might be stretches. Revenge isn’t the entire goal:

Kill la Kill Jormungand

Vinland Saga

Moral of the story: revenge (and war) is no good.

RoH lol