Help!

Im looking for that murim webtoon/manhua/manhwa where the MC is a fat alliance leader that likes to eat so much but he's actually super strong.. and he somehow possesed a suicidal and weak ass guy who was almost killed by his grandfather.. his new body is so weak but he's been training and living healthy so he can rebuild his body to be healthy and strong.. while finding out what happened w his OG body.

The new body has paranoid family and servants because of the many suicide the OG body owner attempted in the past.