[Guyver Spawn]

Devilman could work but Wizard already did the idea of fusing with a demon in order to fight evil. Apocalypse Zero and The Guyver can work too since you can see the Kamen Rider influences in them. Chronos always remind me of Shocker in my opinion. Chronos sends out zoanoids, much like the way organizations like Shocker send out Kaijin.