The 12 Apostles: Or the Horoscopes, the big enemies of Kamen Rider Fourze. Fourze is one of the most entertaining shows I've ever watched, and probably has the best creature designs in the history of KR. The bosses are so badass I found myself rooting for some of them. Among my favourite designs are Libra and Leo.
Kamen Rider OOO S.H Figuarts Takakiriba Takatorata Set Figure Tamashii Bandai JP/OOO had beautiful designs. The figuarts had crummy quality compared to the ryuki ones, but the beautiful design of each component made it worth it. These two figures demonstrate that beauty: even random combis look good
Kamen Rider Ouja: From the ryuki series yet again. One of my least liked designs from the series because it just doesn't carry out the psychopathic nature of his character and looks rather plain. And yea, Ouja is a psychopath, plain and simple. He's not evil, scheming, shrewd or anything... He just lives for violence, and plain violence. Don't be fooled by that simple premise tho: Ouja remains as one of the most popular and likeable KR villains of all time.