I'd love to help you pick out the best bike rack for your 2019 BMW 7 Series. For that the best option is the trunk mounted Yakima FullBack part # Y02634. This is a lightweight rack loaded with features other racks don't have like ability to lock to vehicle and lock bikes to rack plus has a very wide contact pad to help protect paint on your vehicle. view full answer...
Since you said you would prefer a bike carrier that would not have to be mounted on the roof of your 2014 BMW 7 Series, I would suggest a trunk mounted carrier like the Thule OutWay 2 Bike Rack, part # TH45JV. This is a 2 bike carrier with anti-sway cradles that help to protect the bikes and keep them from contact with the car. This carrier has a patented FitDial system that makes it easy to attach the carrier to your BMW. Adjustments to the FitDial are made very easily with the vehicle... view full answer...
The Brophy Drawbar part # BR39FR could be used in a Class I hitch but typically Class I hitches require a specific ball mount be used so I'd check with the manufacturer of your trailer hitch. view full answer...