Name A Series Where The Main Character Didn't Suffer

A series where the main character doesnt have a tragic backstory or didnt suffer in any way throughout the entire series. It has to be a shonen or seinen based series. But not a useless main character. Have/Had a character development without tragedy happening beforehand. Can be a manga or anime. Make sure to state why you recommended the said series. Another person can disagree with you but make sure to state why either.