To an extent, yes but it ultimately becomes part of a belt so I gotta say no to that. Necrom does seem like the last one to ditch a belt so far now that I think about it.

Necrom was the last Rider whose device wasn't linked to a belt of any kind. Before him, Sasword, The Bee, Drake, the Kabuto movie Trio, and all of the Hibiki Riders.

Also Diend?

Yeah, I think Para-DX Level 50 is the last one where the device doesn't, in some way, become a belt. Necrom is the last one where none of his forms use a belt at all, in all the possible colours.

(Unless you want to count Night Rogue, Brad Stark, and the Hell Bros, but that would be silly)

Idk why, but DiEnd always slips my list. :lol

getting Ghost Vibes (TBF it's not the concept that made Ghost suck in fact it was quite interesting it was well)

Gimmick-wise? Yes. In terms of potential character dynamics amongst riders it gives me shades of Kabuto and Gaim and Ryuki. And a bit of Build as well.

I actually thought the historical figures thing in Ghost was a terrible idea. It forces you to associate the powers with existing people/stories which to me is never a good thing, especially the the show fails to represent those people/stories accurately. It makes the show, however minor, that much less self-contained and limited.

Animals, elements, etc are far better for the simplicity of Kamen Rider powers, which lends itself to more freedom and creativity.

I guess G3/G3-X could also count as well, since he has to physically put the armor on and the belt doesn't necessarily "activate" his powers, though if I'm not mistaken, I think the belt acts more like a power source for the suit.

I think Kamen Rider Lupin also used his gun for transformation as well.

Do Blood Stalk/Rogue count as Kamen Riders?