[Kurona]

You should really credit Kida for Hibiki, too. He was the lead writer for that before production went to hell and they had to switch him out for Inoue.

In any case, I can't not go for Kobayashi; and the same goes for Sentai actually. I might as well say Muto's a close second because I like them both for very similar reasons -- they're masters of tearing down characters who are essentially good people so they can triumphantly bounce back. Whether it's Eiji's descent into becoming a Greeed or Right's struggle with Toq0 or Sento facing up to his dark past, I love that they're all able to give shades to ultimately good people and give them flaws and challenges without having to make them assholes in any way.

Though there is one particular difference in how they write: Kobayashi nails the episodic format, while Muto despite certain issues is very, very good at serialised focused series structure. I think ultimately I prefer Kobayashi because Kamen Rider just at its core works best when it's able to be more episodic despite a focused ongoing story, but getting something once in a while like Build where there's no time for filler and breaks makes for a wonderful change in pace and worked very well in its favour.