Ramjet actually first showed up in the Marvel comics, as a lacky of Straxus, the Decepticon leader on Cybertron.
He never really did anything, though, other than provide a body in the back of various scenes. He's actually the conehead I have the most trouble remembering, after Dirge and Thrust.
I've not really been a big fan of IDW's new continuity, bringing various characters, who were barely featured in the original G1 stories, to the fore.