Studies show kids do best when raised by their married to each other biological mother and biological father.
2nd place goes to being raised by single father.
Single moms produce the worst outcomes for their children in all categories, health, mental health, poverty, criminality, substance abuse, academics, etc.
These are statistics, research results compiled by experts, not my opinion.
Don't kill the messenger 😄
There are family dynamics that make it not so simple to rank as 1, 2, 3...such as divorced parents that remarried (step parent) vs divorced parents cohabitating with non parent (boyfriend/girlfriend) vs...etc.
If you need sources I will borrow a line from the LLD Handbook - "your phone/computer has google, use it"