Abu Ahmad al-Hakim: He is questionable
Abu Ahmad ibn Adi al-Jurjani: He steals hadiths and attaches hadiths known from some people he never met to other people he did meet. He elevates the suspended and connects the mursal, and adds to the chains of narration
Abu Bakr al-Barqani: We did not write the hadith of Saleh ibn Abi Muqatil because of his weakness, and he is a fabricator of hadith
Abu Hatim ibn Hibban al-Busti: A sheikh we wrote from in Baghdad, he steals hadith and changes it, and he may have changed more than ten thousand hadiths from what came out of the sheikhs and chapters. His fame among those who wrote hadith from our companions makes it unnecessary to deal with what he changed from the narrations. It is not permissible to rely on him in any way
Abu Sa'd al-Sam'ani: He used to change the hadiths, he is not to be relied upon
Ibn 'Iraq: Liar
Al-Khatib al-Baghdadi: A fabricator of hadith, we did not write his hadith, he used to narrate from memory, but his hadith is full of flaws
Al-Daraqutni: A liar and deceiver, he narrates what he did not hear
Al-Dhahabi: He mentioned a hadith of his in al-Mizan and said: He fabricated it