Maybe 'Diabolik Lovers' could be comparable. Both have a dark and mysterious tone, and the characters have complex relationships. However, the art styles differ slightly.
You might like 'Hunter x Hunter'. It has complex storylines, diverse character abilities, and themes of friendship and growth, much like Naruto. The battles and character arcs are captivating and draw similarities.
Some manga similar to Black Bird could be 'Vampire Knight' or 'Inuyasha'. They share elements of fantasy and romance.
I think 'Natsume's Book of Friends' could be similar. It has elements of supernatural and emotional depth like Black Bird.
You might want to check out 'Fruits Basket'. Both have elements of romance and drama, and the character development is engaging in a similar way to Black Bird.
I think 'Ouran High School Host Club' could be similar. It has a light-hearted and comedic tone with diverse and charming characters like in 'Fruits Basket'.
I'd recommend 'Tower of God.' Both have an immersive world-building and characters with evolving powers, similar to Solo Leveling. Also, the story progression keeps you hooked.
One manga that could be similar is 'Great Teacher Onizuka'. It shares some similarities in terms of the dynamic and unique characters and the school setting.
One manga that could be similar is 'Magi: The Labyrinth of Magic'. It has elements of adventure, magic, and diverse characters like in Aladdin.
I'd suggest checking out 'Re:Zero − Starting Life in Another World'. It shares similarities with Arifureta in terms of the unexpected situations the characters encounter and the growth they undergo throughout the story.
Another manga that's somewhat like 'Ippo' is 'Baki'. It features intense combat and the protagonist's journey to become stronger in the fighting world.