irishdub,
The first person that comes to mind is Origen, who spoke about universal salvation, even for the Devil. If you want to explore his ideas further, try Googling with:
Exclusivist or universalist? Origen the 'wise steward of the word'
While I was out walking, I was thinking of you and your "keep me in your prayers, I'm a sinner".
I wonder if religion is providing you with inner peace or whether it is the cause of torment. The idea of "you are a sinner" is one element of a powerful model employed by the few to control the masses. They play on two fears --(1) a person's recognition of their inadequacies (join the clan!) and (2) the fear of the consequences when God either intervenes or one dies.
Their model then says: (1) you are lost to God and in danger of eternal damnation (2) We are the only people who can show you the way to solve this problem, so come and join in with us (3) You are continually reminded to go back to step #1 ("you are lost ... etc.").
I suggest to you that every morning, before you hop out of bed, you tell yourself - aloud, if possible: "I am not a sinner. I do not fear death. I will enjoy today and make every effort to make the world a better place".
Doug