By your very nature.
You can exclude suffering from natural disasters.
What about other natural causes like animal attacks, diseases or simply falling from a height?
Not impossible, just more rare.
Then I am not the cause of all suffering merely some or a majority of it. A problem with this is that I must have full knowledge of which acts of suffering are caused my nature and which are still caused by others. If humans are still capable of causing suffering after I die then my death does nothing to resolve the type of suffering most people care about. The suffering humans inflict upon other humans.
So my death would result in humans becoming creatures with no free will and freedom of choice. Automatons in the end. People can not choose to become doctors, join the military, run for political officer, follow a religion, etc.
I didn't answer some of your questions because based on my answers some of them need not apply.
Sure some were conditional. However I do need an answer regarding if my "influence" temporarily violates a person's free will.
For example a married couple is in conflict (dialogue) regarding say finances. Can my influence violate the free will of one or both they will suddenly grab a knives to try to kill eachother
In part. However the implications still influence me to lean toward living until the end of my natural life as it will maintain the human condition for a few years more (not knowing when I will die). The alternative just makes human-like automatons now rather than later.