Humidifier and or Air Purifier

Air purifier. It's been a game changer with two St. Bernards.

It depends on several factors.
Most importantly, dog breeds. Some breeds are stinkier than others. Their diet can also affect how they smell. I have a 20 lb Chihuahua Dachshund mix who eats Farmers Dog and has a very short coat. He also gets treats and sometimes gets bad breath if we do not brush his teeth, but his body does not stink, at all. In fact, he mostly smells good in spite of being bathed infrequently. If he gets dusty from running around I just get a damp washcloth and rub him down with a tiny bit of dry dog shampoo. We do wash his blankets regularly. We have hardwood throughout the house and that cuts down significantly on surfaces to trap hair and smells.
We also have a hepa filter running and a dehumidifier, but nothing fancy.

My aunt keeps a very clean house but has golden retrievers and they stink. So do beagles.

Recommend dog cot bed, very easy to clean, and our dog loves it. The rest of bedding and bedding covers we tried, either got destroyed, or got urine or poop, the smell won’t get off after we just wash the cover ( some can be washed entirely, some are not), so we had to threw away all of them.

The smelly dog homes I visit tend to be ones where the bedding and dog isn't washed often enough, so start there!

As PPs have said- leather couch is good. Change your air filters and also the filters in your vacuums (yes plural- you need upright, canister and robo) frequently!

Also I think it's great that you are planning on oral care, OP! Lots of pet owners overlook that.

House train the dog, bathe it, brush its teeth, brush its fur, wash its bedding, don't let it eat stinky treats like collagen rolls or pig ears in the house, keep everything reasonably clean and you are pretty well good. Some breeds do tend to smell more 'doggy' , so keep that in mind when making a selection.

I vacuum every day. Dog's feet get washed after going outside. (simple rinse in a bucket or with a hose--do it once and see the water in the bucket and you won't think I'm crazy for doing this). Bath once a week or anytime they get wet. We go for runs every day and if it's wet, I bathe (short hair lab so this is a quick task). Never on bed or furniture. Beds have a bath sheet towel wrapped on them and those are changed twice a week (the beds are where a lot of smell can build up and get a clean dog smelly, etc. The towel is a quick way to keep it clean and not have to remove the zippered protector.

My house didn’t smell. Short haired dog, no carpet, leather couches.