We have three boys (ages 9, 6, and 4) and we have stayed at AKV, OKW and SSR, along with some others. I would vote SSR then AKV and then OKW. SSR has the Murphy beds, which are an awesome upgrade to the pull-out beds. Plus, the multiple pools were hits with our boys. The only minus might be dining unless you are willing to head over to DS.
AKV, unofficially, has a zoo, and officially some of the best rated dining of any WDW resort. But you may want to see if the menus are too adventurous. Our boys loved the Kidani pool and my wife and I loved the pool bar. The only downside is the pull-out bed and the long hallways. We also did a Savanna View, and while great, it wasn’t required to see a lot of the animals.
OKW will give you a lot of room, but the property is quite large and I’m not a fan of the quiet pools. The dining is also not relatively strong compared to other deluxe resorts. We did have a short walk to the bus stop and the busses were never full, so I did like that.
FWIW, we would happily stay at all three resorts. With
DVC Deluxe Villas, you can’t really go wrong. Worst case scenario for any given resort: it’s different.