Katekyo Hitman Reborn!, Bungou Stray Dogs Recommendations
Bungou Stray Dogs is much more darker than Reborn but also has the mafia involved. Basically because the mafia is somewhat an antagonist in the series of Bungou. It also gave the similar feeling when you read it.
Now for Reborn, it revolves around the mafia and how the protagonist Tsuna's daily life while becoming a mafia boss. Just like Bungou, it also has some supernatural elements mixed in it but has more comedic scenes than Bungou.
I suggest you should read any of these series because it is great to read.