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...
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...
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...