This topic probably belongs in the Unauthorised Transformers Products.
Finding characters to scale with Hegemon, I suggest Deluxe class or Voyager class toys.
Generations: Springer, Blurr, Arcee (not released yet), Blitzwing, Junkheap, Scourge and Kup.
Reveal the Shield: Cyclonus, Wreck-Gar, Rodimus.
And since you're not adverse to non-official transformers I would suggest looking at Unique-Toys Mania King Vintage Color Version (Galvatron), iGear Patrol Specialist (Ironhide), Fansproject Defender (add-on kit for Rodimus), Fansproject City Commander (add-on kit for Ultra Magnus) and the Fansproject Lost Exo-realm line (Dinobots).
I'm sure there are other toys I''ve forgotten to list.
Any figure that comes with swords demands wrist articulation.