The game you described is not that something what coud qualify for triple A release from comparable to GTA V

If I was given chance to release game I woud try to make something like yandere simulator, but with more complexity. It could be something like "narcissist simulator"
where your goal is to get narcissistic supply and if you fail you will lose control of yourself and do stupid things that will reveal you.

Just like in the yandere simulator you work to eliminate your competitors and manipulate people to gain status. You can occasionally kill some random people like serial killer or set them into accidents, or rape them what will boost you self esteem when mysterious death is reported on TV depending on the complexity of the crime.
Also you will be able to save people and help them.

Since it is impossible to make open world like that, this game will have to stick to the somewhat loose story mode where you can identify possible opportunities and use them.

To make everything more interesting there will be "multiplayer" mode which is essentially game editor where you can construct different scenarios for other people to solve.