23: 1957 Ford Thames Trader
You’d think almost any model could succeed when a company is doing well in terms of sales. That was thinking behind the Ford Thames Trader, which was a commercial-focused vehicle. Unfortunately, other automakers were dominating the commercial space around this time. For Ford to make inroads, it would have taken more effort than the company was willing to put forward at the time (via Motor Biscuit).
The main problem with the Thames Trader was the perceived lack of reliability. It seemed like corporations spent more time putting these big trucks in the repair shop instead of in service. Sales-wise, the Thames Trader was one of the poorest-selling Ford models of all time. The company would eventually shift to a more modern platform. Ford has dominated the commercial market with great vehicles since then.