And he shows no obvious signs of fear, so anybody but Rick or Negan killing him off in an interesting way definitely wouldn’t do the character any justice.
There’s definitely something poetic about a bourbon-breathed Simon getting struck by lightning or having a tree fall on his head while he’s walking around.
No, Simon should be the reason behind Simon’s death.
And as it’s implied by his answer during an interview with ComicBook.com, he’s also too good to get taken down by any of the undead hordes out there.