^^^ I think the Connect owners manual was pretty straightforward- under Emergency towing it states it can be towed four down in an emergency with speed and distance restrictions. Under Recreational Towing, tow dolly only with the front wheels off the ground. Your statement that the connect can't be dolly towed is incorrect. The standard Transit can't be towed either flat or on a dolly.
Any of the front wheel drive vans- Ram (full size or mini), Transit Connect or Nissan NV2000 should be able to be dolly towed without issue like any front drive vehicle. The caveat with the full size Ram might be the existence of a dolly large and heavy duty enough to handle the size and weight.