Nisekoi, Yamada-kun to 7-nin no Majo Recommendations
Nisekoi and Yamada-kun are the two romantic shonen respectively of Shounen Jump and Shounen Magazine. And both improve clearly in the manga.
Both of romantic comedy somewhat similar-themed but each work with its unique way, if you like romantic comedies that make you die laughing but also that you hold the story and who leave one wanting more, these works are for you.
Both of these shows are high school harems with a protagonist who has a heart of gold (granted Yamada is bit rougher around the edges).