>>149478408You're right about Devastator being the first combiner who appeared a year before the others being a huge factor, and he's usually the first combiner to appear in later versions of G1, with only IDW1 being contrarian about it.
Most of the other combiner teams were introduced near the end of the cartoon's second season, and got a few spotlight episodes, but by then the movie and seasons 3-4 did a 20 year time skip, and they were already old news, while the comics didn't do so much with any of them after their introduction stories.
The Combaticons' first two cartoon appearances made them seem like one of those sub-groups that had some level of autonomy and independence, like the Dinobots and Insecticons did, they start off as Starscream's personal army, then turn against him and fight off the Autobots and Decepticons at once. This probably made them stand out more than other combiner teams just being new additions to the main Decepticon forces.
The Stunticons were a cool team, and the angle that four of them are insane, and kept in line by Motormaster bullying them was interesting, but I can see why them being "just cars" makes some fans see them as mundane compared with other Decepticons. Modern versions of G1 treating Menasor as the jobber of combiners really hasn't helped, he's supposed to be dangerously insane.
On the Autobot side, the Aerialbots got more spotlight episodes than the Protectobots, who didn't even get an origin episode, and their main spotlight is in BOT, an unpopular episode. Though the Aerialbots have two problem characters, Slingshot is just a dick, while Silverbolt struggling with his fear of heights and overcoming it is supposed to be heroic, but too many fans just think it makes him a whiny bitch.
In season 3 the Technobots did get a few spotlight episodes, usually fighting the Terrorcons, who were basically handled as savage monsters with the same personality.