Abu Ahmad bin Adyy Al-Jarjani: Some of what he narrates is not followed by Munkar
Abu Bakr Al-Bazzar: Lenient in Hadith
Abu Hatim Al-Razi: Sheikh, abandoned in Hadith
Abu Hatim bin Hibban Al-Busti: Munkar in Hadith, narrates from the trustworthy what does not resemble the Hadith of the established narrators. I do not like to use his narration as evidence because of his contradiction of the established narrators in narrations
Abu Zur`ah Al-Razi: Weak
Ibn Hajar Al-Asqalani: Weak
Al-Daraqutni: Munkar in Hadith
Al-Dhahabi: Weak
Ali bin Al-Madini: Munkar in Hadith
Authors of Tahrir Taqrib Al-Tahdhib: Abandoned in Hadith