Recommendations Mc with a system that have common sense and smart

I am look for an mc that can think straight and have common sense and smart i want him to think like we do not like some dumb dull shit mc that I seen in few novel I want him to be mature even if he is 15 he need to be mature, some of you will say that 15 years old are not mature but I think you are wrong, I want an mc that knows what he is talking.

 

I know these novels are fantasy, but even fantasy has his limit on mythological beings.

 

Can you handle MTL?

If yes, mtlnovel has Ancestor Above - MC got inserted into generic xianxia, made it to Golden Core without any apparent cheats/golden thighs like a regular scrub and had an actual life (married, had kids, was a partner/subordinate clan leader of a local strong sect, raised his family with his modern values when inside the house so his kids are casual around him, fought enemies which got him heavily injured to a point he could't heal and then there was 50 years of his healing retreat).

The story starts with him dead in seclusion (his conclusion based on observations) and a family rise system keeping his consciousness still active. So he does his most intelligent at letting his family rise again, hopes he will one day be able to get something in system shop to revive himself and because its family, his decisions regarding his closest living kin (his Foundation Establishment kids) has him playing favorites sometimes.

He also accepts the reality of his situation. No matter how much he exploits the system and his plans include as many scenarios as he can think of, he uses the "closed door" option for years at a time despite not having anything to do from that because without system points he can only watch what happens whether disaster or fortune and that won't help his family and clan.

Edit: so MC is 250-300, but he is mature so far (I just started myself, having read it to chapter 56)

 

I know that kind of characters in fantasy novels but with a system...it's hard to find.

1. The Death Mage Who Doesn’t Want a Fourth Time
2. My House of Horrors
3. Dungeon Defense
4. He Who Fights with Monsters

 

The author xin Feng that wrote The Strongest System wrote other system novels and all of them are really good

 

Be warned about this though. This, and like his other works, are focused on comedy. I've read this and A Valiant Life. It was fun. But there are no resolutions. You could say that it is disappointing. Read these for fun.

 

Nightfall,the path towards heaven