Abu Ahmad bin Adi Al-Jarjani: He is a denier of Hadith from Thabit and others, and he is not followed. His Hadiths are isolated, and I hope there is no problem with him.
Abu Hatim bin Hibban Al-Busti: He is a strong denier of Hadith. He narrates from Thabit things that are not from his Hadith, as if he were another Thabit. His Hadith should not be written down except as a matter of astonishment.
Abu Zar'ah Al-Razi: He is a denier of Hadith. He narrates from Thabit with fabrications.
Al-Dhahabi: The criticism of him is explained as: "There is some concern about him."