Note:

I had to censor few pic as it had too much gore...and this is the one with photos.

John, it was his death that caused his son to go down the path of being an outlaw.

True

John. Arthur sacrificed himself for John and his family so they could live happily. With John's death, it eventually caused Abbigail to die, and jack to become the very thing the gang didn't want him to be. Arthur's sacrifice was in vain with John dead.

Yea

I would save young Lenny and let Arthor get killed

Definitely Hosea. He was killed wrongky