since

[curious]

Which one(s) is / are idiomatic (correct and natural)?

SINCE ( as a time conjunction)
1- I haven't seen them since they were married.
2- I haven't seen them since they have been married.
3- I hadn't seen them since they were married.
4- I hadn't seen them since they had been married.
5- I don't see them since they were married.
6- I didn't see them since they were married.
7- I didn't see them since they had been married.

[Tdol]

The natural way for me would be 'I haven't seen them since they got married'.