You are correct, they are scout size, but tall-ish scout size. Hercules would be taller. The full Menasor (Intimidator) set will be the same height as that first Bruticus set I linked, as well as the second Devastator (Maketoys' Giant) and their upcoming Computron.
There is a 3rd party Stunticon / Menasor set I've looked at. I would love it if the cars were Deluxe sized, but I think they are the old Scout Class size at the least and I could use those without blinking!
I agree that would probably suit Swindle pretty well, if only to make him somewhat more appropriate with the rest of the team scale wise.
That something small like Swindle's Jeep can be on the set with a helicopter and a space shuttle of all things, irritates me a little - as I'm always looking for improvements from G1 days. (Mind you I am a fan of Swindle's - just a different larger vehicle mode might be better for this kind of combiner).
On that topic, what they did for Hound for AoE - making him a troop carrier - could be a great plan for Swindle.