You missed a group, those that accept it and realize death is the final stage of life and have a positive outlook.

My Cancer doctor said I was to happy for having a Cancer diagnosis. And another person I met at the hospital was also jovial. I asked him how he was positive, to see why we had a different outlook than those in dispair. He said “I have lived a good life, every day I wake up is a just a bonus day, why mope when it coyld be your last, enjoy it”