Abu Ahmad ibn Adi al-Jarjani: Denier of Hadith
Abu Ja'far al-'Uqayli: Prone to mistakes
Abu Hatim al-Razi: Believed that delaying (religious obligations) is not truthful. His downfall was his opinions. He was known for piety and worship.
Abu Hatim ibn Hibban al-Busti: Makes mistakes
al-Daraqutni: Not strong (in Hadith)
al-Dhahabi: Great
Yahya ibn Ma'in: Trustworthy, and once: Not strong