I don't think that would work commercially. If you look for action movie Dad's you have Brendan Frasier in the Mummy 2, Liam Neeson in Taken, Arnie in Commando, Die Hard 4, Harrison Ford Jack Ryan and that's all I can think of. All getting into the aciton to save their kids. In TV you have mostly screwed up fathers (Walter White, Tony Soprano). Should there be more? Yes. But either the kids become the lead stars, or the parents look incredibly irresponsible. Either way it's impossible for ongoing narrative books.
Millar created a great father in Big Daddy. But he knew he had to die to let Hit Girl become her own thing, otherwise she's stuck being Robin. In Jupiters Legacy Hutch is another Dad fighting to help his son. And we have Dane in Empress acting like a father, but the main villain is also a father. Mark explores this space more than most creators, but it's a hard area to navigate.
I think if you marry a character everyone immediately expects a child. That's just society. And if there's a child the story is no longer about the parents.