So I already bored with a slim skinny protagonist, i want to try something different. I want to read a manga with a male mc have a robust body just like a manga helck, Ore monogatari, etc. Please help me.

Are you reading the correct genre? In fact, do you only read shoujo or something? If not, I think the rest of the demographic, especially seinen mangas, don't really have slim male protagonists most of the time.

Berserk
Hokuto no Ken
Hajime no Ippo
Toriko
Shamo He gets buff later on
RRR
Saikyou Densetsu Kurosawa
Saiteihen no Otoko

Chinese Translator Accepting translation requests if the manga interests me!

Thanks, but I actually already read half of your recommendations.