Pretty Iconic to me, yet somehow it turned into this in Bay's hands:
Both are entirely composed of construction vehicles
Both include a crane, dump truck, cement truck, bulldozer, front load shovel, and excavator
Honorable mention: both include Long Haul, Mixmaster, Scrapper, and Scavenger
Looks like you would expect Devastator to be a gestalt composed of construction vehicles because it is iconic to his character. Just like you would expect Grimlock to turn into a T-Rex because it is iconic to his character.