[proberts]

Do you mean marriage-based green card applications? These are super easy and fast now (less than 6 months in many cases) and don't require a lot of evidence of the bona fides of the marriage. A few affidavits can be helpful but they're absolutely not required, particularly if the other evidence is solid.

[ftyers]

I meant for work-based ones. E.g. employer sponsored (by public university) ... But yes, with additional spouse dependent. (Both non-citizens, with H1B and H4 respectively)