Based on available information, J-Hope is considered the most fashionable member of BTS.
The provided reference clearly states that J-Hope is known for his strong fashion sense:
- J-Hope is the most fashion conscious member of BTS.
- He loves to shop and put together stylish outfits.
- J-Hope is recognized for carrying out fashionable outfits with great ease.
While all members of BTS are stylish, J-Hope stands out for his particular interest in and aptitude for fashion. This is not to say others aren't fashionable; however, when the question asks specifically "who is the most fashionable," the reference points directly to J-Hope as that individual.
It's also worth noting that fashion is subjective, but based on this specific information from a reliable source, J-Hope is the most fashion-conscious.