Most of the information I find about Qur'an-only versions of Islam tend to be from some random webpage. Some examples are:
Quran-Islam.org. Some of the articles (possibly all) are attributed to someone known as "A. Muhammad".
Free-Minds.org. Some articles here are attributed to Layth Al-Shaiban who has a co-translation of the Qur'an (amazon.com).
QuranMessage.com by Joseph A. Islam.
Looking at random articles from these sites, aside from the Qur'an, the only references I found were to other pages on their respective sites; they don't even cite each other. It's hard to tell, therefore, which scholarly opinion Quranists value.
Question: Which scholars are respected by Quranists?