sorry this is in two parts i went over the 2000 characters, at least a warning comes up now and your reply doesn't vanish into the ether!
After the new civil registration system of 1837 (1864 in Scotland), illegitimate births could only be registered if both natural parents attended the register office if they were unmarried. This was to prevent a woman naming anyone she liked to name as the childs father on a legal document.
In Scotland I believe it was the same case. Therefore if the father attended the register office and added his name as the natural father under the law, then it is likely he was unattached and unmarrried at the time. This might acyually eliminate some of your candidates. You say that there are several likely suspects in the same community with the same name and same occupation, what you can do is identify using the census where these men were actuall living and working around the time of the conception and try to eliminate others aswell, particularly look to see if they are part of a chapel congragation and living with their families. It does sound like a type of stereotyping but it is actually a way that works, good luck.