If you can find a used Mad River Explorer, that may be a good choice. It's not great at any one thing, but does almost everything fairly well. It's a load monster that will carry your whole family and gear and I've fished mine solo many times. If you turn it stern first and sit in the "front" seat you are perfectly positioned for solo paddling.

Another good choice would be a Prospector model. It's a versatile design that is made by most major canoe mfrs., precisely because of its versatility.