Welcome cdcdguy. I think you'll find that Holland America, Princess and Celebrity tend to have fewer kids aboard. They don't have rock walls, water slides or skating rinks. But if you can do without those, you should be OK.
Have you considered seeking out a travel agent? They can help you refine your searches.
Enjoy your search. The planning and anticipation are a big part of the adventure. And make sure you come back to cruise-chat often when you know your itinerary. There's a wealth of information here about ports and excusions.