And I spose if ya wanna stretch it and go with just what their alt-mode was from onscreen characters:

*Sideswipe was a sports car
*Skids was a mini-van/hatchback
*Optimus was a truck
*Bumblebee was a car
*Ratchet was an ambulance
*Starscream was a jet
*Hound was an army vehicle
*Brawl was a tank
*Mixmaster was a cement mixer
*Jetfire was a jet
*Long Haul was a dump truck
*Scavenger was a digger
*Scrapper was a construction vehicle
*Slug/Slag was an outer-space dinosaur
*Grimlock was an outer-space dinosaur


Oh, and ad to the list I did in post 2 - DOTM HA: Drag Strip - definetly G1 inspired