How about Looserfer, the god of the loosers, because if you have rejected Jesus Christ, then you have rejected your only means of salvation and eternal life. If you are content with that, then just choose
Satan as your god, he lets you do what ever you want, if you celebrate all the holidays and sacrifice your first born males, but other than that you can for a short time, enjoy the pleasures of sin for a season. But your life will have no meaning and you will never be anyone to remember.