I live in the forest too and have whippets (and two cats, despite all the "no cats with a whippet" comments).
Assuming the majority of walks are going to be in the forest you're going to need something f with a great recall, due to the cows, ponies, riders, cyclists etc wandering around constantly.
My lot have a reliable recall and, thankfully, no longer show any interest in the ponies. Whips are very very affectionate, really very good with children, not known for any breed specific health issues and lazy buggers happy with one walk a day (zero if it's raining). They are also destructive horrors when puppies, but did teach my children to put their stuff away, feel the cold and there's no way on earth you're going to keep them off the couch.
If they aren't your thing, I'd probably suggest a GSD. I grew up with them and, with training (like all breeds) are great family pets and should be good in the forest as they're usually more focused on their owners than anything else.
I'd avoid any -poo breeds or spaniels, both bonkers. Not keen on terriers, as I've always found them to be snappy when stressed. A staff may be an idea too, I've never came across a horrible one and they ate very affectionate too.
Look forward to seeing what you go for.