Hi, Holly! The "best" resort on WDW property is, of course, going to be a matter of opinion which depends
greatly on one's list of priorities -- location to the various parks, amenities, value/price, dining or recreation choices, etc. There are so many different types of accommodations in so many different locations throughout the 44+ square miles of WDW property! My family and I have stayed at almost all the resorts, and I have to say that we've enjoyed them
all for completely different reasons.
As far as traveling with a large group like yours, you're going to need to decide if you would like to stay in the same room/villa, or if staying in separate rooms (but perhaps near each other) would be sufficient. Next, you'll need to decide what location is of importance to you. Basically, there are four major resort areas -- MK, Epcot/DHS, AK and Downtown Disney. If you would like to stay together, I would suggest looking into a villa at one of the Disney Vacation Club resorts located at each of the four major resort areas. If you don't mind staying in separate accommodations, you can stay at any resort and simply request to be assigned to connecting rooms or ones located near one another.
Then, comes the fun part! Explore all the various
Resort Options and choose the one that seems the best fit for you and your traveling party. If you want to write back and give me more details as far as your priorities, I'd be happy to make more specific recommendations. Have a wonderful day and a magical vacation!