I've seen people that have same situation like me and got succesful with K1. Here's the link
i've been following the information he gave for unconsummated proxy marriage.
Also before we apply K1 we already email the embassy about our condition (unconsummated proxy marriage) and they say we are eligible for K1 and US citizen can send petition to USCIS.
After sending petition to USCIS, we got approved without any RFE.
but now im kinda confused with DS-160 form bcs for US Contact page and Family Page i should list him and the relationship with him should i state he is a spouse or fiance. Since we are unconsummated and in immigration law we are not valid marriage until we consummate it.