Any Standard car without a roof (including racecars) has a 'decent' cockpit view.
The aforementioned Prowler probably has the best one since it appears to be completely modelled separately with working gauges.
The Caterham and Jay Leno Tank Car also feature quite nice looking cockpit views although the one on the Tank Car is let down a bit by using the old PS2 dashboard textures which are more apparant on this car since the dashboard is bigger and made of metal.
The best one without working dials is the Chaparral 2J in my opinion, it looks almost if not entirely Premium quality.