Osaka with family

Hello:

I have a family of six and will be doing Osaka for 4 nights. Planning our trip to start in alignment with presidents weekend. I am pretty sure I need 2 rooms. We are plan on visiting USJ, maybe see the castle. I am platinum, have 5 night upgrades. Looking for a place that is best located, pool (4 boys), treats platinum well, breakfast too. What are your recommendations for best place to stay? I appreciate the communities help.

Cheers and safe travels.