Kickhopper. Because quite frankly, a "monstrous Contract Monster" is quite useless when it's moving at a snail's pace.

Hate to say it but KH can't clock up..

I just really don't think Amazon would ever lose to Fourze.

Everyone seems to think that Fourze's modules put him in that much of an advantage, despite the fact that he's always bumbling.

I'm pretty sure he can. He shares the same belt as most of the other Kabuto Riders (save for Kabuto and Gatack,) and they all could Clock Up. Besides, it'd be an illogical design choice on ZECT's part, considering the fact the Rider Systems were developed to fight Worms and their ability to Clock Up.

Except that he totally can. Don't try to confuse anyone.

When did he clock up? I don't recall him ever doing it in the show

And I can see that. If nothing else, Gentaro has a lot more zoning options than Amazon and could probably stay out of melee long enough to take him down. I still think Amazon holds the advantage, but at least this time I can totally see where the other side is coming from (unlike Ryuki beating Agito).

I honestly don't remember whether or not the Hoppers could Clock Up. It is worth pointing out, though, that the Hopper Zecters were noticeably different than the others. They were the only two Zecters that were essentially twins and they didn't give their Riders a Masked Form. I can see them not having a Clock Up option either.

Kabuto was one of the series (pretty much Hibiki-onward) that I watched every episode of. Kick Hopper and Punch Hopper never Clocked Up to my recollection.