Abu Ahmad ibn Adi al-Jurjani: He narrates hadiths that are not preserved, and in some of his narrations there are munkar (rejected) hadiths. I have not seen any statement from the early scholars regarding his truthfulness or weakness. He mentioned a chain of narration and said: Most of what he narrates from Yahya ibn Abi Kathir is known, and most of what he narrates with this chain of narration is not supported by anyone else.
Abu al-Faraj ibn al-Jawzi: Weak
Abu Bakr al-Bayhaqi: Weak
Abu Hatim al-Razi: A weak sheikh, narrator of munkar hadith. I do not know of any authentic hadith from him.
Abu Hatim ibn Hibban al-Busti: He sometimes errs. He mentioned him among the unreliable narrators and said: He alters the narrations and narrates fabricated hadiths from trustworthy narrators. He is weak and makes many mistakes.
Al-Dhahabi: Weak. His weakness is not from a single aspect.
Abdullah ibn Abd al-Rahman al-Darimi: I hope that he is not as Yahya ibn Ma'in said.
Muhammad ibn Ismail al-Bukhari: Narrator of Munkar Hadith
Yahya ibn Ma'in: He is nothing.