Targetmasters are a separate sub-group from the Seeker Jets, and not all Decepticon Targetmasters are jets (i.e. Spinister, Quake). "Jets" is used here as a descriptor of the sub-group, so called by Hasbro in the catalogues. It's not intended to be a description of the alt mode, otherwise this poll would include every jet-moded Decepticon and it'd be massive! Astrotrain and Blitzwing (funny how you haven't included Octane) are Triple Changers. And Astrotrain's jet mode is a space shuttle, which isn't a fighter jet... or any kind of military vehicle (they were used for space exploration).

There will be separate polls coming soon for Targetmasters, Triple Changers and other sub-groups.