No. Either you side with the ghouls and the humans die, you side with Tenpenny and the ghouls die, or you get them to live in peace and Roy Phillips just kills everybody anyway.
The best possible solution is to never take on the quest in the first place, and everyone lives (although you won't get the ghoul mask that way).
If you do want to complete the quest, I recommend making both humans and ghouls live in peace, and then get the ghoul mask. Then never go back there again... the end.